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  • !MNH_LIC Copyright 2019-2022 CNRS, Meteo-France and Universite Paul Sabatier
    
    !MNH_LIC This is part of the Meso-NH software governed by the CeCILL-C licence
    
    !MNH_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt
    
    !-----------------------------------------------------------------
    
    !
    !    ######################
    MODULE MODI_IBM_DETECT  
      !    ###################### 
      !
      INTERFACE
         !
         SUBROUTINE IBM_DETECT(PPHI)
           !
           REAL, DIMENSION(:,:,:,:) ,INTENT(IN) :: PPHI
           !
         END SUBROUTINE IBM_DETECT
         !
      END INTERFACE
      !
    END MODULE MODI_IBM_DETECT
    !
    !     ###########################
    SUBROUTINE IBM_DETECT(PPHI)
      !     ###########################
      !
      !
      !****  IBM_DETECT is dedicated to the characterization of the ghost point and
      !                    associated image points
      !                
      !    PURPOSE
      !    -------
      !****  The purpose of this routine is to affect an specific index to cells where
      !      ghost points are localized. Depending on order of numerical scheme the 
      !      thickness of ghost points layer varies as the index value. For each cell
      !      marked as ghost the corresponding image point location is stored. 
    
      !    METHOD
      !    ------
      !****  Iterative procedure to characterize ghost point locations 
      !      - local test on the sign change of the levelset function (first layer)
      !      - local detection of the first layer to define the neighboring second layer
      !      - repeat of the previous step for high order numerical scheme
      !    
      !
      !    EXTERNAL
      !    --------
      !      SUBROUTINE ?
      !
      !    IMPLICIT ARGUMENTS
      !    ------------------
      !       MODD_?   
      !
      !    REFERENCE
      !    ---------
      !
      !    AUTHOR
      !    ------
      !      Franck Auguste (CERFACS-AE)
      !
      !    MODIFICATIONS
      !    -------------
      !      Original         01/01/2019
      !
      !------------------------------------------------------------------------------
      !       
      !**** 0. DECLARATIONS
      !     ---------------
      !
      ! module
      USE MODE_POS
      USE MODE_ll
      USE MODE_IO
      !
      ! declaration
      USE MODD_IBM_PARAM_n
      USE MODD_PARAMETERS, ONLY: JPVEXT,JPHEXT
      USE MODD_METRICS_n, ONLY: XDXX,XDYY,XDZZ,XDZX,XDZY
      USE MODD_LBC_n
      USE MODD_CONF, ONLY: NHALO
      USE MODD_VAR_ll, ONLY: IP
      USE MODD_REF_n, ONLY: XRHODJ,XRHODREF
      !
      ! interface
      USE MODI_SHUMAN
      USE MODI_GRADIENT_M
      USE MODI_GRADIENT_U
      USE MODI_GRADIENT_V
      USE MODI_GRADIENT_W
      USE MODI_IBM_LOCATCORN
      USE MODI_IBM_VALUECORN
      USE MODI_IBM_INTERPOS
      USE MODI_GRADIENT_UV
      USE MODI_GRADIENT_VW
      USE MODI_GRADIENT_UW
      USE MODI_GDIV
      !
      IMPLICIT NONE
      !
      !------------------------------------------------------------------------------
      !
      !       0.1  declarations of arguments
      !
      REAL, DIMENSION(:,:,:,:), INTENT(IN) :: PPHI ! LevelSet functions
      !
      !------------------------------------------------------------------------------
      !
      !       0.2  declaration of local variables
      !
      INTEGER                                  :: IIB,IJB,IKB,IIE,IJE,IKE                    ! physical domain size
      INTEGER                                  :: IIU,IJU,IKU,IIUM,IJUM,IKUM,JN1,JN2         ! numerical domain size
      INTEGER                                  :: JI,JJ,JK,JI2,JJ2,JK2,JL,JM,JN,JMM,JNN,JP   ! loop index
      INTEGER                                  :: JIM1,JIP1,JJM1,JJP1,JKM1,JKP1,JI3,JJ3,JK3  ! loop boundaries
      INTEGER                                  :: JIM2,JIP2,JJM2,JJP2,JKM2,JKP2
      INTEGER, DIMENSION(:,:,:,:), ALLOCATABLE :: I_INDE_GHOST                               ! ghosts index storage
      INTEGER                                  :: I_DIME_GHOST,I_INDE_LOCAT
      INTEGER, DIMENSION(:,:)    , ALLOCATABLE :: I_NUMB_GHOST
      INTEGER, DIMENSION(:)      , ALLOCATABLE :: I_INDE_TEMPO,I_INDE_TEMPO2
      TYPE(LIST_ll), POINTER                   :: TZFIELDS_ll                                ! list of fields to exchange
      INTEGER                                  :: IINFO_ll,I_NUMB_LAYER
      REAL, DIMENSION(:,:,:,:)   , ALLOCATABLE :: ZXPOS,ZYPOS,ZZPOS,Z_NORM_TEMP1             ! staggered grid arrays
      REAL, DIMENSION(:,:,:)     , ALLOCATABLE :: Z_NORM_TEMP2,Z_NORM_TEMP3
      REAL, DIMENSION(:,:,:,:)   , ALLOCATABLE :: Z_NORM_GHOST                               ! vec(n)
      REAL, DIMENSION(:,:,:,:)   , ALLOCATABLE :: Z_NORM_TEMPO,ZIBM_TESTING,ZPHI
      REAL                                     :: ZLGHO
      REAL, DIMENSION(:)         , ALLOCATABLE :: ZVECT,ZPROD,Z_PHI
      REAL, DIMENSION(:,:)       , ALLOCATABLE :: Z_IMG,Z_GHO
      INTEGER                                  :: I_NUMB_LAYERV,I_NUMB_LAYERP,I_DIME_GHOSTV,I_DIME_GHOSTP
      REAL                                     :: ZSEAR,ZISI,ZJSI,ZKSI,ZLIMG
      REAL                                     :: ZIBM_TESTI,PPHI_CORR,PPHI_TEST
      INTEGER                                  :: JHALO,IKM,JLL
      !
      !------------------------------------------------------------------------------
      !
      !       0.3  Allocation
      !
      IIU=SIZE(PPHI,1)
      IJU=SIZE(PPHI,2)
      IKU=SIZE(PPHI,3)
      CALL GET_INDICE_ll(IIB,IJB,IIE,IJE)
      IKB=1  +JPVEXT
      IKE=IKU-JPVEXT
      IKM=INT(IKU/2.)
      !
      ALLOCATE(I_INDE_GHOST(IIB:IIE,IJB:IJE,IKB:IKE,4))
      ALLOCATE(ZIBM_TESTING(IIU,IJU,IKU,4))
      ALLOCATE(Z_PHI(8),ZPROD(6),ZVECT(3),Z_IMG(8,3),Z_GHO(8,3),I_INDE_TEMPO(3),I_INDE_TEMPO2(3))
    
      ALLOCATE(Z_NORM_GHOST(IIU,IJU,IKU,3),Z_NORM_TEMPO(IIU,IJU,IKU,3))
    
      !
      !------------------------------------------------------------------------------
      !
      !**** 1. PRELIMINARIES
      !     ----------------
      JHALO                 = 0
      ZVECT(:)              = 0.
      ZPROD(:)              = 0.
      Z_PHI(:)              = 0.
      Z_IMG(:,:)            = 0.
      Z_GHO(:,:)            = 0.
      I_INDE_TEMPO(:)       = 0
      I_INDE_GHOST(:,:,:,:) = 0
      Z_NORM_GHOST(:,:,:,:) = 0.
      Z_NORM_TEMPO(:,:,:,:) = 0.
      ZIBM_TESTING(:,:,:,:) = 0.
      !
      !**** 2. EXECUTIONS
      !     -------------
      !
      !I_IBM_NUMB_GHOST stores the ghost number per layer and node type 
      I_NUMB_LAYERV = NIBM_LAYER_V
      I_NUMB_LAYERP = max(NIBM_LAYER_P,NIBM_LAYER_T,NIBM_LAYER_E, &
           NIBM_LAYER_R,NIBM_LAYER_Q,NIBM_LAYER_S)
      I_NUMB_LAYER = max(I_NUMB_LAYERV,I_NUMB_LAYERP)
      !
      ALLOCATE(I_NUMB_GHOST(4,I_NUMB_LAYER))
      I_NUMB_GHOST(:,:)=0
      !
      ! Ghost cells detection
      DO JL = 1,4
         ! 
         ! Number of ghost layers per PUVW nodes
         IF (JL==1) THEN
            I_NUMB_LAYER = I_NUMB_LAYERP
         ELSE
            I_NUMB_LAYER = I_NUMB_LAYERV
         ENDIF
         !
         ! arrays computation
         IF (JL==1) THEN
            IIUM=IIE
            IJUM=IJE
            IKUM=IKE
         ENDIF
         IF (JL==2) THEN
            IIUM=IIE
            IJUM=IJE
            IKUM=IKE
         ENDIF
         IF (JL==3) THEN
            IIUM=IIE
            IJUM=IJE
            IKUM=IKE
         ENDIF
         IF (JL==4) THEN
            IIUM=IIE
            IJUM=IJE
            IKUM=IKE
         ENDIF
         !
         DO JK = IKB,IKUM
            !
            JKM1 = JK-I_NUMB_LAYER
            JKP1 = JK+I_NUMB_LAYER
            !
            IF (JK==IKB ) JKM1 = JK
            IF (JK==IKUM) JKP1 = JK
            IF (I_NUMB_LAYER>=2) THEN
               IF (JK==IKB+1 ) JKM1 = JK-1
               IF (JK==IKUM-1) JKP1 = JK+1
            ENDIF
            IF (I_NUMB_LAYER>=3) THEN
               IF (JK==IKB+2 ) JKM1 = JK-2
               IF (JK==IKUM-2) JKP1 = JK+2
            ENDIF
            JKM1 = max(2    ,JKM1)
            JKP1 = min(IKU-1,JKP1)
            !
            DO JJ = IJB,IJUM
               !  
               JJM1 = JJ-I_NUMB_LAYER
               JJP1 = JJ+I_NUMB_LAYER
               !
               IF (LSOUTH_ll().and.JJ==IJB)    JJM1=JJ
               IF (LNORTH_ll().and.JJ==IJUM)   JJP1=JJ
               IF (I_NUMB_LAYER>=2) THEN
                  IF (LSOUTH_ll().and.JJ==IJB+1)  JJM1=JJ-1
                  IF (LNORTH_ll().and.JJ==IJUM-1) JJP1=JJ+1
               ENDIF
               IF (I_NUMB_LAYER>=3) THEN
                  IF (LSOUTH_ll().and.JJ==IJB+2)  JJM1=JJ-2
                  IF (LNORTH_ll().and.JJ==IJUM-2) JJP1=JJ+2
               ENDIF
               JJM1 = max(1  ,JJM1)
               JJP1 = min(IJU,JJP1)
               ! 
               DO JI = IIB,IIUM
                  !
                  JIM1 = JI-I_NUMB_LAYER
                  JIP1 = JI+I_NUMB_LAYER
                  !
                  IF (LWEST_ll().and.JI==IIB)    JIM1=JI
                  IF (LEAST_ll().and.JI==IIUM)   JIP1=JI
                  IF (I_NUMB_LAYER>=2) THEN        
                     IF (LWEST_ll().and.JI==IIB+1)  JIM1=JI-1
                     IF (LEAST_ll().and.JI==IIUM-1) JIP1=JI+1
                  ENDIF
                  IF (I_NUMB_LAYER>=3) THEN
                     IF (LWEST_ll().and.JI==IIB+2)  JIM1=JI-2
                     IF (LEAST_ll().and.JI==IIUM-2) JIP1=JI+2
                  ENDIF
                  JIM1 = max(1  ,JIM1)
                  JIP1 = min(IIU,JIP1)
                  !
                  ! test for embedded solid region
                  IF (PPHI(JI,JJ,JK,JL).gt.-XIBM_EPSI) THEN
                     !
                     DO JM=1,3
    
                        IF (JM==1) THEN
                           JIM2 = JI
                           JIP2 = JI
                           JJM2 = JJ
                           JJP2 = JJ
                           JKM2 = JKM1
                           JKP2 = JKP1
                        ENDIF
                        IF (JM==2) THEN
                           JIM2 = JIM1
                           JIP2 = JIP1
                           JJM2 = JJ
                           JJP2 = JJ
                           JKM2 = JK
                           JKP2 = JK
                        ENDIF
                        IF (JM==3) THEN
                           JIM2 = JI
                           JIP2 = JI
                           JJM2 = JJM1
                           JJP2 = JJP1
                           JKM2 = JK
                           JKP2 = JK
                        ENDIF
                        !
                        DO JK2= JKM2,JKP2
                           DO JJ2= JJM2,JJP2
                              DO JI2= JIM2,JIP2
                                 !
                                 ! interface presence test (multi layer) 
                                 IF ((PPHI(JI,JJ,JK,JL)*PPHI(JI2,JJ2,JK2,JL)).lt.-XIBM_EPSI) THEN
                                    I_INDE_LOCAT = max(abs(JI-JI2),abs(JJ-JJ2),abs(JK-JK2))
                                    IF (I_INDE_GHOST(JI,JJ,JK,JL)/=0) THEN
                                       I_INDE_GHOST(JI,JJ,JK,JL) = min(I_INDE_GHOST(JI,JJ,JK,JL),I_INDE_LOCAT)
                                       ZIBM_TESTING(JI,JJ,JK,JL)=I_INDE_GHOST(JI,JJ,JK,JL)*1.
                                    ELSE
                                       I_INDE_GHOST(JI,JJ,JK,JL) = I_INDE_LOCAT
                                       ZIBM_TESTING(JI,JJ,JK,JL)=I_INDE_GHOST(JI,JJ,JK,JL)*1.
                                    ENDIF
                                 ENDIF
                              ENDDO
                           ENDDO
                        ENDDO
                        !
                     ENDDO
                     !
                     ! ghosts counter
                     IF (I_INDE_GHOST(JI,JJ,JK,JL)>0) THEN
                        I_NUMB_GHOST(JL,I_INDE_GHOST(JI,JJ,JK,JL))=I_NUMB_GHOST(JL,I_INDE_GHOST(JI,JJ,JK,JL))+1
                     ENDIF
                     !
                  ENDIF
                  !
               ENDDO
            ENDDO
         ENDDO
         !
      ENDDO
      !
      I_DIME_GHOSTV = 0
      DO JL=1,I_NUMB_LAYERV
         I_DIME_GHOSTV = max(I_DIME_GHOSTV,I_NUMB_GHOST(2,JL),I_NUMB_GHOST(3,JL),I_NUMB_GHOST(4,JL))
      ENDDO
      I_DIME_GHOSTP = 0
      DO JL=1,I_NUMB_LAYERP  
         I_DIME_GHOSTP = max(I_DIME_GHOSTP,I_NUMB_GHOST(1,JL))
      ENDDO
      !
      ! === GHOSTS storage === 
      ! NIBM_STOR_GHOSV(A,B,C)
      ! A : number of ghosts for each type of nodes
      ! B : type of ghosts layer
      ! C : type of ghosts PUVW
      ! D : index location IJK
      ALLOCATE(NIBM_GHOST_V(I_DIME_GHOSTV,I_NUMB_LAYERV,3,3))
      NIBM_GHOST_V(:,:,:,:) = 0
      !
      ! NIBM_STOR_GHOSP(A,B,C)
      ! A : number of ghosts for each type of nodes P
      ! B : type of ghosts layer
      ! C : ---
      ! D : index location IJK
      ALLOCATE(NIBM_GHOST_P(I_DIME_GHOSTP,I_NUMB_LAYERP,1,3))
      NIBM_GHOST_P(:,:,:,:) = 0  
      !
      ! XIBM_STOR_GHOSV(A,B,C,D)
      ! A : number of ghosts in each type of nodes PUVW
      ! B : layer number  
      ! C : type of nodes UVW for the image(s)
      ! D : location of the ghost
      ALLOCATE(XIBM_GHOST_V(I_DIME_GHOSTV,I_NUMB_LAYERV,3,3))
      XIBM_GHOST_V(:,:,:,:) = 0.
      !
      ! XIBM_STOR_GHOSP(A,B,C,D,E)
      ! A : number of ghosts in each type of nodes P
      ! B : layer number
      ! C : ---
      ! D : location of the ghost
      ALLOCATE(XIBM_GHOST_P(I_DIME_GHOSTP,I_NUMB_LAYERP,1,3))
      XIBM_GHOST_P(:,:,:,:) = 0.
      !
      ! Reset ghost research
      I_NUMB_GHOST(:,:) = 0
      DO JL = 1,4
         ! 
         ! Number of ghost layers per PUVW nodes
         IF (JL==1) THEN
            I_NUMB_LAYER = I_NUMB_LAYERP
         ELSE
            I_NUMB_LAYER = I_NUMB_LAYERV
         ENDIF
         !
         IIUM=IIE
         IJUM=IJE
         IKUM=IKE
         !
         DO JM = 1,I_NUMB_LAYER
            DO JK = IKB,IKUM
               DO JJ = IJB,IJUM
                  DO JI = IIB,IIUM
                     IF (I_INDE_GHOST(JI,JJ,JK,JL)==JM) THEN
                        I_NUMB_GHOST(JL,JM) = I_NUMB_GHOST(JL,JM) + 1
                        IF (JL==1) THEN
                           NIBM_GHOST_P(I_NUMB_GHOST(JL,JM),JM,JL  ,1) = JI
                           NIBM_GHOST_P(I_NUMB_GHOST(JL,JM),JM,JL  ,2) = JJ
                           NIBM_GHOST_P(I_NUMB_GHOST(JL,JM),JM,JL  ,3) = JK
                        ELSE
                           NIBM_GHOST_V(I_NUMB_GHOST(JL,JM),JM,JL-1,1) = JI
                           NIBM_GHOST_V(I_NUMB_GHOST(JL,JM),JM,JL-1,2) = JJ
                           NIBM_GHOST_V(I_NUMB_GHOST(JL,JM),JM,JL-1,3) = JK
                        ENDIF
                     ENDIF
                  ENDDO
               ENDDO
            ENDDO
         ENDDO
         !
      ENDDO
      !
      !=== IMAGES cells detection === 
      !
      ! NIBM_TEST_IMAGV(A,B,C,D,E,F)
      ! A : number of ghosts in each type of nodes UVW
      ! B : layer number
      ! C : UVW node type for ghost
      ! D : UVW node type for image
      ! E : 1 for MIRROR or IMAGE1 - 2 for IMAGE2 - 3 for MIRROR
      ! F : corner index
      ALLOCATE(XIBM_TESTI_V(I_DIME_GHOSTV,I_NUMB_LAYERV,3,3,3,8))
      XIBM_TESTI_V = 1.
      !
      ! NIBM_TEST_IMAGP(A,B,C,D,E,F)
      ! A : number of ghosts in each type of nodes P
      ! B : layer number
      ! C : ---
      ! D : ---
      ! E : 1 for MIRROR or IMAGE1 - 2 for IMAGE2 - 3 for MIRROR
      ! F : corner index
      ALLOCATE(XIBM_TESTI_P(I_DIME_GHOSTP,I_NUMB_LAYERP,1,1,3,8))
      XIBM_TESTI_P = 1.
      !
      ! NIBM_STOR_IMAGV(A,B,C,D,E,F)
      ! A : number of ghosts in each type of nodes UVW
      ! B : layer number
      ! C : UVW node type for ghost
      ! D : UVW node type for image
      ! E : 1 for MIRROR or IMAGE1 - 2 for IMAGE2 - 3 for MIRROR
      ! F : index of the image(s) 
      ALLOCATE(NIBM_IMAGE_V(I_DIME_GHOSTV,I_NUMB_LAYERV,3,3,3,3))
      NIBM_IMAGE_V(:,:,:,:,:,:) = 0
      !
      ! NIBM_STOR_IMAGP(A,B,C,D,E,F)
      ! A : number of ghosts in each type of nodes P
      ! B : layer number
      ! C : ---
      ! D : ---
      ! E : 1 for MIRROR or IMAGE1 - 2 for IMAGE2 - 3 for MIRROR
      ! F : index of the image(s) 
      ALLOCATE(NIBM_IMAGE_P(I_DIME_GHOSTP,I_NUMB_LAYERP,1,1,3,3))
      NIBM_IMAGE_P(:,:,:,:,:,:) = 0
      !
      ! XIBM_STOR_IMAGV(A,B,C,D,E)
      ! A : number of ghosts in each type of nodes PUVW
      ! B : layer number  
      ! C : type of nodes UVW for the image(s)
      ! D : 1 for IMAGE1 - 2 for IMAGE2 - 3 for MIRROR 
      ! E : location of the image(s)
      ALLOCATE(XIBM_IMAGE_V(I_DIME_GHOSTV,I_NUMB_LAYERV,3,3,3))
      XIBM_IMAGE_V(:,:,:,:,:) = 0.
      !
      ! XIBM_STOR_IMAGP(A,B,C,D,E)
      ! A : number of ghosts in each type of nodes P
      ! B : layer number
      ! C : ---
      ! D : 1 for IMAGE1 - 2 for IMAGE2 - 3 for MIRROR 
      ! E : location of the image(s)
      ALLOCATE(XIBM_IMAGE_P(I_DIME_GHOSTP,I_NUMB_LAYERP,1,3,3))
      XIBM_IMAGE_P(:,:,:,:,:) = 0.
      !
    
      ALLOCATE(Z_NORM_TEMP1(IIU,IJU,IKU,4),Z_NORM_TEMP2(IIU,IJU,IKU), & 
    
    469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968
           Z_NORM_TEMP3(IIU,IJU,IKU))
      ALLOCATE(ZPHI(IIU,IJU,IKU,4))
      ZPHI = 0.
      !
      DO JL = 1,4
         ! 
         ! Number of ghost layers per PUVW nodes
         IF (JL==1) THEN
            I_NUMB_LAYER = I_NUMB_LAYERP
         ELSE
            I_NUMB_LAYER = I_NUMB_LAYERV
         ENDIF
         IF (I_NUMB_LAYER==0) GO TO 667
         !
         ! div(n) computation
         IF (JL==1) THEN
            Z_NORM_TEMPO(:,:,:,1) = - GX_U_M(PPHI(:,:,:,2),XDXX,XDZZ,XDZX)
            Z_NORM_TEMPO(:,:,:,2) = - GY_V_M(PPHI(:,:,:,3),XDYY,XDZZ,XDZY)
            Z_NORM_TEMPO(:,:,:,3) = - GZ_W_M(PPHI(:,:,:,4),XDZZ)
            Z_NORM_TEMP1(:,:,:,1) = - GX_M_U(1,IKU,1,PPHI(:,:,:,1),XDXX,XDZZ,XDZX) 
            Z_NORM_TEMP1(:,:,:,2) = - GY_M_V(1,IKU,1,PPHI(:,:,:,1),XDYY,XDZZ,XDZY)
            Z_NORM_TEMP1(:,:,:,3) = - GZ_M_W(1,IKU,1,PPHI(:,:,:,1),XDZZ)
            CALL GDIV(CLBCX,CLBCY,XDXX,XDYY,XDZX,XDZY,XDZZ,Z_NORM_TEMP1(:,:,:,1),Z_NORM_TEMP1(:,:,:,2),Z_NORM_TEMP1(:,:,:,3), &
                 XIBM_CURV(:,:,:))
            XIBM_CURV(:,:,:)=-XIBM_CURV(:,:,:)*(XRHODJ(:,:,:)/XRHODREF(:,:,:))**(2./3.)
            IF (LWEST_ll ()) XIBM_CURV(1,:,:)   = XIBM_CURV(2    ,:,:)
            IF (LEAST_ll ()) XIBM_CURV(IIU,:,:) = XIBM_CURV(IIU-1,:,:)  
            IF (LSOUTH_ll()) XIBM_CURV(:,1,:)   = XIBM_CURV(:,2    ,:)
            IF (LNORTH_ll()) XIBM_CURV(:,IJU,:) = XIBM_CURV(:,IJU-1,:)
            XIBM_CURV(:,:,1  ) = XIBM_CURV(:,:,    2)
            XIBM_CURV(:,:,IKU) = XIBM_CURV(:,:,IKU-1)
            NULLIFY(TZFIELDS_ll)
            CALL ADD3DFIELD_ll(TZFIELDS_ll,XIBM_CURV(:,:,:),'IBM_DETECT::XIBM_CURV')
            CALL UPDATE_HALO_ll(TZFIELDS_ll,IINFO_ll)
            CALL CLEANLIST_ll(TZFIELDS_ll)
            XIBM_SU(:,:,:,1)=MXM(XIBM_CURV(:,:,:))
            XIBM_SU(:,:,:,2)=MYM(XIBM_CURV(:,:,:))
            XIBM_SU(:,:,:,3)=MZM(XIBM_CURV(:,:,:))
            IF (LWEST_ll ()) XIBM_SU(1,:,:,1)   = XIBM_SU(2    ,:,:,1)
            IF (LEAST_ll ()) XIBM_SU(IIU,:,:,1) = XIBM_SU(IIU-1,:,:,1)  
            IF (LSOUTH_ll()) XIBM_SU(:,1,:,1)   = XIBM_SU(:,2    ,:,1)
            IF (LNORTH_ll()) XIBM_SU(:,IJU,:,1) = XIBM_SU(:,IJU-1,:,1)
            XIBM_SU(:,:,1  ,1) = XIBM_SU(:,:,    2,1)
            XIBM_SU(:,:,IKU,1) = XIBM_SU(:,:,IKU-1,1)
            IF (LWEST_ll ()) XIBM_SU(1,:,:,2)   = XIBM_SU(2    ,:,:,2)
            IF (LEAST_ll ()) XIBM_SU(IIU,:,:,2) = XIBM_SU(IIU-1,:,:,2)  
            IF (LSOUTH_ll()) XIBM_SU(:,1,:,2)   = XIBM_SU(:,2    ,:,2)
            IF (LNORTH_ll()) XIBM_SU(:,IJU,:,2) = XIBM_SU(:,IJU-1,:,2)
            XIBM_SU(:,:,1  ,2) = XIBM_SU(:,:,    2,2)
            XIBM_SU(:,:,IKU,2) = XIBM_SU(:,:,IKU-1,2)
            IF (LWEST_ll ()) XIBM_SU(1,:,:,3)   = XIBM_SU(2    ,:,:,3)
            IF (LEAST_ll ()) XIBM_SU(IIU,:,:,3) = XIBM_SU(IIU-1,:,:,3)  
            IF (LSOUTH_ll()) XIBM_SU(:,1,:,3)   = XIBM_SU(:,2    ,:,3)
            IF (LNORTH_ll()) XIBM_SU(:,IJU,:,3) = XIBM_SU(:,IJU-1,:,3)
            XIBM_SU(:,:,1  ,3) = XIBM_SU(:,:,    2,3)
            XIBM_SU(:,:,IKU,3) = XIBM_SU(:,:,IKU-1,3)
            !
            NULLIFY(TZFIELDS_ll)
            CALL ADD3DFIELD_ll(TZFIELDS_ll,XIBM_SU(:,:,:,1),'IBM_DETECT::XIBM_SU')
            CALL ADD3DFIELD_ll(TZFIELDS_ll,XIBM_SU(:,:,:,2),'IBM_DETECT::XIBM_SU')
            CALL ADD3DFIELD_ll(TZFIELDS_ll,XIBM_SU(:,:,:,3),'IBM_DETECT::XIBM_SU')
            CALL UPDATE_HALO_ll(TZFIELDS_ll,IINFO_ll)
            CALL CLEANLIST_ll(TZFIELDS_ll)
            !
            XIBM_CURV(:,:,:)=0.5*XIBM_CURV(:,:,:)+0.5/3.*(MXF(XIBM_SU(:,:,:,1))+ &
                 MYF(XIBM_SU(:,:,:,2))+ &
                 MZF(XIBM_SU(:,:,:,3)))
            !
            IF (LWEST_ll ()) XIBM_CURV(1,:,:)   = XIBM_CURV(2    ,:,:)
            IF (LEAST_ll ()) XIBM_CURV(IIU,:,:) = XIBM_CURV(IIU-1,:,:)  
            IF (LSOUTH_ll()) XIBM_CURV(:,1,:)   = XIBM_CURV(:,2    ,:)
            IF (LNORTH_ll()) XIBM_CURV(:,IJU,:) = XIBM_CURV(:,IJU-1,:)
            XIBM_CURV(:,:,1  ) = XIBM_CURV(:,:,    2)
            XIBM_CURV(:,:,IKU) = XIBM_CURV(:,:,IKU-1)    
            !
            XIBM_CURV(:,:,:)=1./(ABS(XIBM_CURV(:,:,:))+XIBM_EPSI)
            XIBM_CURV(:,:,:)=MIN(1., XIBM_CURV(:,:,:))
            XIBM_CURV(:,:,:)=MAX(0., XIBM_CURV(:,:,:))
            XIBM_CURV(:,:,:)=1.-XIBM_CURV(:,:,:)
            NULLIFY(TZFIELDS_ll)
            CALL ADD3DFIELD_ll(TZFIELDS_ll,XIBM_CURV(:,:,:),'IBM_DETECT::XIBM_CURV')
            CALL UPDATE_HALO_ll(TZFIELDS_ll,IINFO_ll)
            CALL CLEANLIST_ll(TZFIELDS_ll)
            !
         ENDIF
         !
         IF (JL==2) THEN
            Z_NORM_TEMP1(:,:,:,1) = - GX_U_M(PPHI(:,:,:,2),XDXX,XDZZ,XDZX)
            Z_NORM_TEMP1(:,:,:,2) = - GY_V_M(PPHI(:,:,:,3),XDYY,XDZZ,XDZY)
            Z_NORM_TEMP1(:,:,:,3) = - GZ_W_M(PPHI(:,:,:,4),XDZZ)
            Z_NORM_TEMPO(:,:,:,1) = MXM(Z_NORM_TEMP1(:,:,:,1)) 
            Z_NORM_TEMPO(:,:,:,2) = MXM(Z_NORM_TEMP1(:,:,:,2))
            Z_NORM_TEMPO(:,:,:,3) = MXM(Z_NORM_TEMP1(:,:,:,3))
         ENDIF
         IF (JL==3) THEN
            Z_NORM_TEMP1(:,:,:,1) = - GX_U_M(PPHI(:,:,:,2),XDXX,XDZZ,XDZX)
            Z_NORM_TEMP1(:,:,:,2) = - GY_V_M(PPHI(:,:,:,3),XDYY,XDZZ,XDZY)
            Z_NORM_TEMP1(:,:,:,3) = - GZ_W_M(PPHI(:,:,:,4),XDZZ)
            Z_NORM_TEMPO(:,:,:,1) = MYM(Z_NORM_TEMP1(:,:,:,1))
            Z_NORM_TEMPO(:,:,:,2) = MYM(Z_NORM_TEMP1(:,:,:,2))
            Z_NORM_TEMPO(:,:,:,3) = MYM(Z_NORM_TEMP1(:,:,:,3))
         ENDIF
         IF (JL==4) THEN
            Z_NORM_TEMP1(:,:,:,1) = - GX_U_M(PPHI(:,:,:,2),XDXX,XDZZ,XDZX)
            Z_NORM_TEMP1(:,:,:,2) = - GY_V_M(PPHI(:,:,:,3),XDYY,XDZZ,XDZY)
            Z_NORM_TEMP1(:,:,:,3) = - GZ_W_M(PPHI(:,:,:,4),XDZZ)
            Z_NORM_TEMPO(:,:,:,1) = MZM(Z_NORM_TEMP1(:,:,:,1))
            Z_NORM_TEMPO(:,:,:,2) = MZM(Z_NORM_TEMP1(:,:,:,2))
            Z_NORM_TEMPO(:,:,:,3) = MZM(Z_NORM_TEMP1(:,:,:,3))           
         ENDIF
         !
         Z_NORM_TEMPO(:,:,1  ,1) = +Z_NORM_TEMPO(:,:,    2,1)
         Z_NORM_TEMPO(:,:,IKU,1) = +Z_NORM_TEMPO(:,:,IKU-1,1)
         Z_NORM_TEMPO(:,:,1  ,2) = +Z_NORM_TEMPO(:,:,    2,2)
         Z_NORM_TEMPO(:,:,IKU,2) = +Z_NORM_TEMPO(:,:,IKU-1,2)
         Z_NORM_TEMPO(:,:,1  ,3) = 2*Z_NORM_TEMPO(:,:,    2,3)-Z_NORM_TEMPO(:,:,    3,3)
         Z_NORM_TEMPO(:,:,IKU,3) = 2*Z_NORM_TEMPO(:,:,IKU-1,3)-Z_NORM_TEMPO(:,:,IKU-2,3)
         Z_NORM_TEMPO(:,:,1  ,3) = MAX(0.,Z_NORM_TEMPO(:,:,1  ,3))
         Z_NORM_TEMPO(:,:,2  ,3) = MAX(0.,Z_NORM_TEMPO(:,:,2  ,3))
         Z_NORM_TEMPO(:,:,3  ,3) = MAX(0.,Z_NORM_TEMPO(:,:,3  ,3))
         Z_NORM_TEMPO(:,:,IKU  ,3) = MIN(0.,Z_NORM_TEMPO(:,:,IKU  ,3))
         Z_NORM_TEMPO(:,:,IKU-1,3) = MIN(0.,Z_NORM_TEMPO(:,:,IKU-1,3))
         Z_NORM_TEMPO(:,:,IKU-2,3) = MIN(0.,Z_NORM_TEMPO(:,:,IKU-2,3))
         !
         IF (LWEST_ll ()) THEN
            DO JLL=1,3
               Z_NORM_TEMPO(JLL  ,:,1:IKM-1,1) = 0.
               Z_NORM_TEMPO(JLL  ,:,1:IKM-1,2) = 0.
               Z_NORM_TEMPO(JLL  ,:,1:IKM-1,3) =+1.
               Z_NORM_TEMPO(JLL  ,:,IKM:IKU,1) = 0.
               Z_NORM_TEMPO(JLL  ,:,IKM:IKU,2) = 0.
               Z_NORM_TEMPO(JLL  ,:,IKM:IKU,3) =-1.
            ENDDO
         ENDIF
         IF (LEAST_ll ()) THEN
            DO JLL=1,3
               Z_NORM_TEMPO(IIU-JLL+1,:,1:IKM-1,1) = 0.
               Z_NORM_TEMPO(IIU-JLL+1,:,1:IKM-1,2) = 0.
               Z_NORM_TEMPO(IIU-JLL+1,:,1:IKM-1,3) =+1.
               Z_NORM_TEMPO(IIU-JLL+1,:,IKM:IKU,1) = 0.
               Z_NORM_TEMPO(IIU-JLL+1,:,IKM:IKU,2) = 0.
               Z_NORM_TEMPO(IIU-JLL+1,:,IKM:IKU,3) =-1.
            ENDDO
         ENDIF
         IF (LSOUTH_ll()) THEN
            DO JLL=1,3
               Z_NORM_TEMPO(:,JLL,1:IKM-1,1) = 0.
               Z_NORM_TEMPO(:,JLL,1:IKM-1,2) = 0.
               Z_NORM_TEMPO(:,JLL,1:IKM-1,3) =+1.
               Z_NORM_TEMPO(:,JLL,IKM:IKU,1) = 0.
               Z_NORM_TEMPO(:,JLL,IKM:IKU,2) = 0.
               Z_NORM_TEMPO(:,JLL,IKM:IKU,3) =-1.
            ENDDO
         ENDIF
         IF (LNORTH_ll()) THEN
            DO JLL=1,3
               Z_NORM_TEMPO(:,IJU-JLL+1,1:IKM-1,1) = 0.
               Z_NORM_TEMPO(:,IJU-JLL+1,1:IKM-1,2) = 0.
               Z_NORM_TEMPO(:,IJU-JLL+1,1:IKM-1,3) =+1.
               Z_NORM_TEMPO(:,IJU-JLL+1,IKM:IKU,1) = 0.
               Z_NORM_TEMPO(:,IJU-JLL+1,IKM:IKU,2) = 0.
               Z_NORM_TEMPO(:,IJU-JLL+1,IKM:IKU,3) =-1.
            ENDDO
         ENDIF
         !
         NULLIFY(TZFIELDS_ll)
         CALL ADD3DFIELD_ll(TZFIELDS_ll,Z_NORM_TEMPO(:,:,:,1),'IBM_DETECT::Z_NORM_TEMPO')
         CALL ADD3DFIELD_ll(TZFIELDS_ll,Z_NORM_TEMPO(:,:,:,2),'IBM_DETECT::Z_NORM_TEMPO')
         CALL ADD3DFIELD_ll(TZFIELDS_ll,Z_NORM_TEMPO(:,:,:,3),'IBM_DETECT::Z_NORM_TEMPO')
         CALL UPDATE_HALO_ll(TZFIELDS_ll,IINFO_ll)
         CALL CLEANLIST_ll(TZFIELDS_ll)
         !
         Z_NORM_TEMP2(:,:,:)  = sqrt(Z_NORM_TEMPO(:,:,:,1)**2.+Z_NORM_TEMPO(:,:,:,2)**2.+Z_NORM_TEMPO(:,:,:,3)**2.)  
         !
         WHERE (abs(Z_NORM_TEMP2(:,:,:)) .gt. XIBM_EPSI)
            Z_NORM_GHOST(:,:,:,1) =  Z_NORM_TEMPO(:,:,:,1)/Z_NORM_TEMP2(:,:,:)
            Z_NORM_GHOST(:,:,:,2) =  Z_NORM_TEMPO(:,:,:,2)/Z_NORM_TEMP2(:,:,:)
            Z_NORM_GHOST(:,:,:,3) =  Z_NORM_TEMPO(:,:,:,3)/Z_NORM_TEMP2(:,:,:)
         ELSEWHERE
            Z_NORM_GHOST(:,:,:,1) = 0.
            Z_NORM_GHOST(:,:,:,2) = 0.
            Z_NORM_GHOST(:,:,:,3) = 1.
         ENDWHERE
         !
         WHERE (abs(Z_NORM_TEMP2(:,:,:)) .gt. XIBM_EPSI)
            Z_NORM_TEMPO(:,:,:,1) =  1./Z_NORM_TEMP2(:,:,:)
            Z_NORM_TEMPO(:,:,:,2) =  1./Z_NORM_TEMP2(:,:,:)
            Z_NORM_TEMPO(:,:,:,3) =  1./Z_NORM_TEMP2(:,:,:)
         ELSEWHERE
            Z_NORM_TEMPO(:,:,:,1) = 1.
            Z_NORM_TEMPO(:,:,:,2) = 1.
            Z_NORM_TEMPO(:,:,:,3) = 1.
         ENDWHERE
         !
         DO JMM = 1, I_NUMB_LAYER  
            !
            DO JM = 1, I_NUMB_GHOST(JL,JMM)
               !
               ! ghost index
               IF (JL==1) THEN
                  I_INDE_TEMPO(:) = NIBM_GHOST_P(JM,JMM,JL  ,:)
               ELSE
                  I_INDE_TEMPO(:) = NIBM_GHOST_V(JM,JMM,JL-1,:)
               ENDIF
               JI2 = I_INDE_TEMPO(1)
               JJ2 = I_INDE_TEMPO(2)
               JK2 = I_INDE_TEMPO(3)
               !
               ! ghost location
               Z_GHO(:,:) =  IBM_LOCATCORN(I_INDE_TEMPO,JL)
               ZLGHO = (abs(Z_GHO(1,1)-Z_GHO(8,1))* &
                    abs(Z_GHO(1,2)-Z_GHO(8,2))* &
                    abs(Z_GHO(1,3)-Z_GHO(8,3)))**(1./3.)
               ZVECT(1) = Z_GHO(1,1)  
               ZVECT(2) = Z_GHO(1,2) 
               ZVECT(3) = Z_GHO(1,3) 
               !
               PPHI_TEST = ABS(Z_NORM_GHOST(JI2,JJ2,JK2,1))+ABS(Z_NORM_GHOST(JI2,JJ2,JK2,2))+ABS(Z_NORM_GHOST(JI2,JJ2,JK2,3))
               PPHI_CORR = MAX(PPHI(JI2,JJ2,JK2,JL),(JMM*1.-1.)*ZLGHO*PPHI_TEST)
               PPHI_CORR = MIN(PPHI_CORR           ,(JMM*1.+0.)*ZLGHO*PPHI_TEST)
               !
               ! Storage of mirror/image1/image2/mirror locations
               IF (JL==1) THEN
                  XIBM_IMAGE_P(JM,JMM,JL  ,1,:) = (1.0*ZLGHO+PPHI_CORR)*Z_NORM_GHOST(JI2,JJ2,JK2,:) +  ZVECT(:) 
                  XIBM_IMAGE_P(JM,JMM,JL  ,2,:) = (2.0*ZLGHO+PPHI_CORR)*Z_NORM_GHOST(JI2,JJ2,JK2,:) +  ZVECT(:)
                  XIBM_IMAGE_P(JM,JMM,JL  ,3,:) = (0.5*ZLGHO+PPHI_CORR)*Z_NORM_GHOST(JI2,JJ2,JK2,:) +  ZVECT(:)
                  XIBM_GHOST_P(JM,JMM,JL    ,:) = ZVECT(:)
                  XIBM_IMAGE_P(JM,JMM,JL  ,1,3) = MAX(XIBM_EPSI,XIBM_IMAGE_P(JM,JMM,JL  ,1,3))
                  XIBM_IMAGE_P(JM,JMM,JL  ,2,3) = MAX(XIBM_EPSI,XIBM_IMAGE_P(JM,JMM,JL  ,2,3))
                  XIBM_IMAGE_P(JM,JMM,JL  ,3,3) = MAX(XIBM_EPSI,XIBM_IMAGE_P(JM,JMM,JL  ,3,3))
                  XIBM_GHOST_P(JM,JMM,JL    ,3) = MAX(XIBM_EPSI,XIBM_GHOST_P(JM,JMM,JL    ,3))
               ELSE
                  XIBM_IMAGE_V(JM,JMM,JL-1,1,:) = (1.0*ZLGHO+PPHI_CORR)*Z_NORM_GHOST(JI2,JJ2,JK2,:) +  ZVECT(:)
                  XIBM_IMAGE_V(JM,JMM,JL-1,2,:) = (2.0*ZLGHO+PPHI_CORR)*Z_NORM_GHOST(JI2,JJ2,JK2,:) +  ZVECT(:)
                  XIBM_IMAGE_V(JM,JMM,JL-1,3,:) = (0.5*ZLGHO+PPHI_CORR)*Z_NORM_GHOST(JI2,JJ2,JK2,:) +  ZVECT(:)
                  XIBM_GHOST_V(JM,JMM,JL-1  ,:) = ZVECT(:)
                  XIBM_IMAGE_V(JM,JMM,JL-1,1,3) = MAX(XIBM_EPSI,XIBM_IMAGE_V(JM,JMM,JL-1,1,3))
                  XIBM_IMAGE_V(JM,JMM,JL-1,2,3) = MAX(XIBM_EPSI,XIBM_IMAGE_V(JM,JMM,JL-1,2,3))
                  XIBM_IMAGE_V(JM,JMM,JL-1,3,3) = MAX(XIBM_EPSI,XIBM_IMAGE_V(JM,JMM,JL-1,3,3))
                  XIBM_GHOST_V(JM,JMM,JL-1  ,3) = MAX(XIBM_EPSI,XIBM_GHOST_V(JM,JMM,JL-1  ,3))
               ENDIF
               !
               ! iterative procedure to find image cell
               ZISI = 0.
               ZJSI = 0.
               ZKSI = 0.
               IF (abs(Z_NORM_GHOST(JI2,JJ2,JK2,1)).gt.XIBM_EPSI) THEN
                  ZISI =Z_NORM_GHOST(JI2,JJ2,JK2,1)/abs(Z_NORM_GHOST(JI2,JJ2,JK2,1))
               ENDIF
               IF (abs(Z_NORM_GHOST(JI2,JJ2,JK2,2)).gt.XIBM_EPSI) THEN
                  ZJSI =Z_NORM_GHOST(JI2,JJ2,JK2,2)/abs(Z_NORM_GHOST(JI2,JJ2,JK2,2))
               ENDIF
               IF (abs(Z_NORM_GHOST(JI2,JJ2,JK2,3)).gt.XIBM_EPSI) THEN
                  ZKSI =Z_NORM_GHOST(JI2,JJ2,JK2,3)/abs(Z_NORM_GHOST(JI2,JJ2,JK2,3))
               ENDIF
               JIM1 = 3-2*JMM*int(min(0.,ZISI))
               JIP1 = 3+2*JMM*int(max(0.,ZISI))
               JJM1 = 3-2*JMM*int(min(0.,ZJSI))
               JJP1 = 3+2*JMM*int(max(0.,ZJSI))
               JKM1 = 3-2*JMM*int(min(0.,ZKSI))
               JKP1 = 3+2*JMM*int(max(0.,ZKSI))
               JIM2=max(1    ,JI2-JIM1)
               JIP2=min(IIU-1,JI2+JIP1)       
               JJM2=max(1    ,JJ2-JJM1)
               JJP2=min(IJU-1,JJ2+JJP1)           
               JKM2=max(1    ,JK2-JKM1)
               JKP2=min(IKU-1,JK2+JKP1)  
               !
               JN1 = 1
               JN2 = 1
               IF (JL/=1) THEN
                  JN1 = 2 
                  JN2 = 4
               ENDIF
               !
               DO JNN=1,3
                  !
                  ! image1/image2/mirror location
                  IF (JL==1) THEN
                     ZVECT(:) = XIBM_IMAGE_P(JM,JMM,JL  ,JNN,:)
                  ELSE
                     ZVECT(:) = XIBM_IMAGE_V(JM,JMM,JL-1,JNN,:)
                  ENDIF
                  !
                  DO JN =JN1,JN2
                     !
                     ! search image depending on location type 
                     ZSEAR = 0.
                     DO JK= JKM2,JKP2
                        DO JJ= JJM2,JJP2
                           DO JI= JIM2,JIP2
                              !
                              ! nodes of the potential image cell
                              I_INDE_TEMPO(1)  = JI
                              I_INDE_TEMPO(2)  = JJ
                              I_INDE_TEMPO(3)  = JK
                              Z_IMG(:,:) = IBM_LOCATCORN(I_INDE_TEMPO,JN)
                              !
                              ! location of the potential cell
                              ZPROD(1)  = min(Z_IMG(1,1),Z_IMG(2,1),Z_IMG(3,1),Z_IMG(4,1),&
                                   Z_IMG(5,1),Z_IMG(6,1),Z_IMG(7,1),Z_IMG(8,1))
                              ZPROD(2)  = max(Z_IMG(1,1),Z_IMG(2,1),Z_IMG(3,1),Z_IMG(4,1),&
                                   Z_IMG(5,1),Z_IMG(6,1),Z_IMG(7,1),Z_IMG(8,1))    
                              ZPROD(3)  = min(Z_IMG(1,2),Z_IMG(2,2),Z_IMG(3,2),Z_IMG(4,2),&
                                   Z_IMG(5,2),Z_IMG(6,2),Z_IMG(7,2),Z_IMG(8,2))
                              ZPROD(4)  = max(Z_IMG(1,2),Z_IMG(2,2),Z_IMG(3,2),Z_IMG(4,2),&
                                   Z_IMG(5,2),Z_IMG(6,2),Z_IMG(7,2),Z_IMG(8,2))
                              ZPROD(5)  = min(Z_IMG(1,3),Z_IMG(2,3),Z_IMG(3,3),Z_IMG(4,3),&
                                   Z_IMG(5,3),Z_IMG(6,3),Z_IMG(7,3),Z_IMG(8,3))
                              ZPROD(6)  = max(Z_IMG(1,3),Z_IMG(2,3),Z_IMG(3,3),Z_IMG(4,3),&
                                   Z_IMG(5,3),Z_IMG(6,3),Z_IMG(7,3),Z_IMG(8,3))
                              !
                              IF (((ZVECT(1).gt.(ZPROD(1)-XIBM_EPSI)).and.(ZVECT(1).lt.(ZPROD(2)+XIBM_EPSI))).and.&
                                   ((ZVECT(2).gt.(ZPROD(3)-XIBM_EPSI)).and.(ZVECT(2).lt.(ZPROD(4)+XIBM_EPSI))).and.&
                                   ((ZVECT(3).gt.(ZPROD(5)-XIBM_EPSI)).and.(ZVECT(3).lt.(ZPROD(6)+XIBM_EPSI)))) THEN
                                 !
                                 JI3=JI
                                 JJ3=JJ
                                 JK3=JK
                                 !
                                 IF (JL==1) THEN
                                    ZSEAR = 0.5
                                    NIBM_IMAGE_P(JM,JMM,JL  ,JN  ,JNN,1) = JI3
                                    NIBM_IMAGE_P(JM,JMM,JL  ,JN  ,JNN,2) = JJ3
                                    NIBM_IMAGE_P(JM,JMM,JL  ,JN  ,JNN,3) = MAX(JK3,IKB)
                                    I_INDE_TEMPO2(1)= JI3
                                    I_INDE_TEMPO2(2)= JJ3
                                    I_INDE_TEMPO2(3)= JK3
                                    Z_PHI(:) = IBM_VALUECORN(PPHI(:,:,:,JN),I_INDE_TEMPO2)
                                    IF (JMM==1) ZIBM_TESTI = 0.
                                    IF (JMM/=1) ZIBM_TESTI = 1.
                                    DO JP=1,8
                                       IF (Z_PHI(JP).gt.-XIBM_EPSI) THEN
                                          XIBM_TESTI_P(JM,JMM,JL  ,JN  ,JNN,JP)=0.
                                       ELSE
                                          XIBM_TESTI_P(JM,JMM,JL  ,JN  ,JNN,JP)=1.
                                       ENDIF
                                       ZIBM_TESTI = ZIBM_TESTI+XIBM_TESTI_P(JM,JMM,JL  ,JN,JNN,JP)
                                    ENDDO
                                    IF (ZIBM_TESTI.gt.+XIBM_EPSI) THEN
                                       IF (LIBM_TROUBLE) XIBM_SUTR(JI2,JJ2,JK2,JL)=0.
                                       IF ((JI2>=IIB.AND.JI2<=IIE).AND.(JI3<=IIB).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JI3-IIB))
                                       ENDIF
                                       IF ((JI2>=IIB.AND.JI2<=IIE).AND.(JI3>=IIE).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JI3-IIE))
                                       ENDIF
                                       IF ((JJ2>=IJB.AND.JJ2<=IJE).AND.(JJ3<=IJB).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JJ3-IJB))
                                       ENDIF
                                       IF ((JJ2>=IJB.AND.JJ2<=IJE).AND.(JJ3>=IJE).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JJ3-IJE))
                                       ENDIF
                                       ZSEAR = 1.
                                    ENDIF
                                    GO TO 666
                                 ELSE
                                    ZSEAR = 0.5
                                    NIBM_IMAGE_V(JM,JMM,JL-1,JN-1,JNN,1) = JI3
                                    NIBM_IMAGE_V(JM,JMM,JL-1,JN-1,JNN,2) = JJ3
                                    NIBM_IMAGE_V(JM,JMM,JL-1,JN-1,JNN,3) = MAX(JK3,IKB)
                                    I_INDE_TEMPO2(1)= JI3
                                    I_INDE_TEMPO2(2)= JJ3
                                    I_INDE_TEMPO2(3)= JK3
                                    Z_PHI(:) = IBM_VALUECORN(PPHI(:,:,:,JN),I_INDE_TEMPO2)
                                    IF (JMM==1) ZIBM_TESTI = 0.
                                    IF (JMM/=1) ZIBM_TESTI = 1.
                                    DO JP=1,8
                                       IF (Z_PHI(JP).gt.-XIBM_EPSI) THEN
                                          XIBM_TESTI_V(JM,JMM,JL-1,JN-1,JNN,JP)=0. 
                                       ELSE
                                          XIBM_TESTI_V(JM,JMM,JL-1,JN-1,JNN,JP)=1.
                                       ENDIF
                                       ZIBM_TESTI = ZIBM_TESTI+XIBM_TESTI_V(JM,JMM,JL-1,JN-1,JNN,JP)
                                    ENDDO
                                    IF (ZIBM_TESTI.gt.+XIBM_EPSI) THEN
                                       IF (LIBM_TROUBLE) XIBM_SUTR(JI2,JJ2,JK2,JL)=0.
                                       IF ((JI2>=IIB.AND.JI2<=IIE).AND.(JI3<=IIB).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JI3-IIB))
                                       ENDIF
                                       IF ((JI2>=IIB.AND.JI2<=IIE).AND.(JI3>=IIE).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JI3-IIE))
                                       ENDIF
                                       IF ((JJ2>=IJB.AND.JJ2<=IJE).AND.(JJ3<=IJB).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JJ3-IJB))
                                       ENDIF
                                       IF ((JJ2>=IJB.AND.JJ2<=IJE).AND.(JJ3>=IJE).AND.(JMM==1)) THEN
                                          JHALO = MAX(JHALO,ABS(JJ3-IJE))
                                       ENDIF
                                       ZSEAR = 1.
                                    ENDIF
                                    GO TO 666
                                 ENDIF
                              ENDIF
                           ENDDO
                        ENDDO
                     ENDDO
                     !
    666              CONTINUE
                     !
                     IF ((ZSEAR.gt.0.25).AND.(ZSEAR.lt.0.75).AND.(JMM==1)) THEN
                        ZPHI(JI2,JJ2,JK2,JL)=1.
                        IF (JL==1) THEN
                           WRITE(*,*)'===== IBM WARNING NEW ======'
                           WRITE(*,*)'Non detected PPP images cell'
                           WRITE(*,*)'ghost',JI2,JJ2,JK2
                           WRITE(*,*)'ghost typ',JL,JMM
                           WRITE(*,*)'levelset',PPHI(JI2,JJ2,JK2,JL)
                           WRITE(*,*)XIBM_GHOST_P(JM,JMM,JL,1),XIBM_GHOST_P(JM,JMM,JL,2),XIBM_GHOST_P(JM,JMM,JL,3)
                           WRITE(*,*)Z_NORM_GHOST(JI2,JJ2,JK2,1),Z_NORM_GHOST(JI2,JJ2,JK2,2),Z_NORM_GHOST(JI2,JJ2,JK2,3) 
                           WRITE(*,*)Z_NORM_TEMPO(JI2,JJ2,JK2,1),Z_NORM_TEMPO(JI2,JJ2,JK2,2),Z_NORM_TEMPO(JI2,JJ2,JK2,3) 
                           WRITE(*,*)'image loc:',JN
                           WRITE(*,*)'image typ:',JNN
                           WRITE(*,*)XIBM_IMAGE_P(JM,JMM,JL,JNN,1),XIBM_IMAGE_P(JM,JMM,JL,JNN,2),XIBM_IMAGE_P(JM,JMM,JL,JNN,3)
                        ELSE
                           WRITE(*,*)'===== IBM WARNING NEW ======'
                           WRITE(*,*)'Non detected UVW images cell'
                           WRITE(*,*)'ghost:',JI2,JJ2,JK2
                           WRITE(*,*)'ghost typ',JL,JMM
                           WRITE(*,*)'levelset',PPHI(JI2,JJ2,JK2,JL)
                           WRITE(*,*)XIBM_GHOST_V(JM,JMM,JL-1,1),XIBM_GHOST_V(JM,JMM,JL-1,2),XIBM_GHOST_V(JM,JMM,JL-1,3)
                           WRITE(*,*)Z_NORM_GHOST(JI2,JJ2,JK2,1),Z_NORM_GHOST(JI2,JJ2,JK2,2),Z_NORM_GHOST(JI2,JJ2,JK2,3) 
                           WRITE(*,*)Z_NORM_TEMPO(JI2,JJ2,JK2,1),Z_NORM_TEMPO(JI2,JJ2,JK2,2),Z_NORM_TEMPO(JI2,JJ2,JK2,3)
                           WRITE(*,*)'image loc:',JN
                           WRITE(*,*)'image typ:',JNN
                           WRITE(*,*)XIBM_IMAGE_V(JM,JMM,JL-1,JNN,1),XIBM_IMAGE_V(JM,JMM,JL-1,JNN,2),XIBM_IMAGE_V(JM,JMM,JL-1,JNN,3)
                        ENDIF
                        I_INDE_TEMPO(1)  = JIM2
                        I_INDE_TEMPO(2)  = JJM2
                        I_INDE_TEMPO(3)  = JKM2
                        Z_IMG(:,:) = IBM_LOCATCORN(I_INDE_TEMPO,JN)
                        WRITE(*,*)'LOC MIN',Z_IMG(1,1),Z_IMG(1,2),Z_IMG(1,3) 
                        I_INDE_TEMPO(1)  = JIP2
                        I_INDE_TEMPO(2)  = JJP2
                        I_INDE_TEMPO(3)  = JKP2
                        Z_IMG(:,:) = IBM_LOCATCORN(I_INDE_TEMPO,JN)
                        WRITE(*,*)'LOC MAX',Z_IMG(8,1),Z_IMG(8,2),Z_IMG(8,3) 
                     ENDIF
                     !
                     IF ((ZSEAR.lt.0.25).AND.(JMM==1)) THEN
                        ZPHI(JI2,JJ2,JK2,JL)=1.
                        IF (JL==1) THEN
                           WRITE(*,*)'===== IBM WARNING ======'
                           WRITE(*,*)'Non detected PPP images cell'
                           WRITE(*,*)'ghost',JI2,JJ2,JK2
                           WRITE(*,*)'ghost typ',JL,JMM
                           WRITE(*,*)'levelset',PPHI(JI2,JJ2,JK2,JL)
                           WRITE(*,*)XIBM_GHOST_P(JM,JMM,JL,1),XIBM_GHOST_P(JM,JMM,JL,2),XIBM_GHOST_P(JM,JMM,JL,3)
                           WRITE(*,*)Z_NORM_GHOST(JI2,JJ2,JK2,1),Z_NORM_GHOST(JI2,JJ2,JK2,2),Z_NORM_GHOST(JI2,JJ2,JK2,3) 
                           WRITE(*,*)Z_NORM_TEMPO(JI2,JJ2,JK2,1),Z_NORM_TEMPO(JI2,JJ2,JK2,2),Z_NORM_TEMPO(JI2,JJ2,JK2,3) 
                           WRITE(*,*)'image loc:',JN
                           WRITE(*,*)'image typ:',JNN
                           WRITE(*,*)XIBM_IMAGE_P(JM,JMM,JL,JNN,1),XIBM_IMAGE_P(JM,JMM,JL,JNN,2),XIBM_IMAGE_P(JM,JMM,JL,JNN,3)
                        ELSE
                           WRITE(*,*)'===== IBM WARNING ======'
                           WRITE(*,*)'Non detected UVW images cell'
                           WRITE(*,*)'ghost:',JI2,JJ2,JK2
                           WRITE(*,*)'ghost typ',JL,JMM
                           WRITE(*,*)'levelset',PPHI(JI2,JJ2,JK2,JL)
                           WRITE(*,*)XIBM_GHOST_V(JM,JMM,JL-1,1),XIBM_GHOST_V(JM,JMM,JL-1,2),XIBM_GHOST_V(JM,JMM,JL-1,3)
                           WRITE(*,*)Z_NORM_GHOST(JI2,JJ2,JK2,1),Z_NORM_GHOST(JI2,JJ2,JK2,2),Z_NORM_GHOST(JI2,JJ2,JK2,3) 
                           WRITE(*,*)Z_NORM_TEMPO(JI2,JJ2,JK2,1),Z_NORM_TEMPO(JI2,JJ2,JK2,2),Z_NORM_TEMPO(JI2,JJ2,JK2,3)
                           WRITE(*,*)'image loc:',JN
                           WRITE(*,*)'image typ:',JNN
                           WRITE(*,*)XIBM_IMAGE_V(JM,JMM,JL-1,JNN,1),XIBM_IMAGE_V(JM,JMM,JL-1,JNN,2),XIBM_IMAGE_V(JM,JMM,JL-1,JNN,3)
                        ENDIF
                        I_INDE_TEMPO(1)  = JIM2
                        I_INDE_TEMPO(2)  = JJM2
                        I_INDE_TEMPO(3)  = JKM2
                        Z_IMG(:,:) = IBM_LOCATCORN(I_INDE_TEMPO,JN)
                        WRITE(*,*)'LOC MIN',Z_IMG(1,1),Z_IMG(1,2),Z_IMG(1,3) 
                        I_INDE_TEMPO(1)  = JIP2
                        I_INDE_TEMPO(2)  = JJP2
                        I_INDE_TEMPO(3)  = JKP2
                        Z_IMG(:,:) = IBM_LOCATCORN(I_INDE_TEMPO,JN)
                        WRITE(*,*)'LOC MAX',Z_IMG(8,1),Z_IMG(8,2),Z_IMG(8,3) 
                     ENDIF
                  ENDDO
               ENDDO
            ENDDO
         ENDDO
         !
    667  CONTINUE
         !
         IF ((NHALO<=JHALO).AND.(JMM==1)) WRITE(*,*)'### WARNING HALO ###',JHALO,IP
         !
      ENDDO
      WRITE(*,*)'### HALO ###',NHALO,JHALO
      !        
      !**** X. DEALLOCATIONS/CLOSES
      !     -----------------------
      !
      DEALLOCATE(I_INDE_TEMPO,I_INDE_TEMPO2,I_NUMB_GHOST)
      DEALLOCATE(Z_NORM_GHOST,Z_NORM_TEMPO,Z_NORM_TEMP1,Z_NORM_TEMP2,Z_NORM_TEMP3)
      DEALLOCATE(ZVECT,ZPROD,ZPHI)
      DEALLOCATE(Z_PHI,Z_IMG,Z_GHO)
      ! 
      RETURN
      !
    END SUBROUTINE IBM_DETECT