[a2019]

Hi All,

I am very new to OpenFoam and trying to run the case with chtMultiRegionFoam. The case is very simpele geometrically (fluid layer "r4" between the solid layers). The mesh is created by blockMesh and then command splitMeshRegions -cellZones -overwrite is used. The problem is that the interface is not created between the fluid and solid regions. How to deal with this problem?

blockMeshDisct:

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  9
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

r1_depth0 10;
r2_depth0 180;
r3_depth0 15;
r4_depth0 28;
r5_depth0 100;

r4_width0 45;

case_width #calc " 2 * $r4_width0 ";
case_height 21; //75;

r2_depth #calc " $r2_depth0 + $r1_depth0 ";
r3_depth #calc " $r3_depth0 + $r2_depth ";
r4_depth #calc " $r4_depth0 + $r3_depth ";
r5_depth #calc " $r5_depth0 + $r4_depth ";

bcs 3;
bcf 1;
ratio 1.5;
nnw #calc " ceil( $case_width / $bcs ) ";
nnh #calc " ceil( $case_height / $bcs / $ratio) ";
nn_r1 #calc " ceil( $r1_depth0 / $bcs ) ";
nn_r2 #calc " ceil( $r2_depth0 / $bcs ) ";
nn_r3 #calc " ceil( $r3_depth0 / $bcs ) ";
nn_r5 #calc " ceil( $r5_depth0 / $bcs ) ";
nn_r4 #calc " ceil( $r4_depth0 / $bcf ) ";

convertToMeters    0.001;

vertices
(
// r1
  (0            0           0)  // vert 0
  ($r1_depth0 0           0)  // vert 1
  ($r1_depth0 $case_width 0)  // vert 2
  (0            $case_width 0)  // vert 3
  (0            0           $case_height)  // vert 4
  ($r1_depth0 0           $case_height)  // vert 5
  ($r1_depth0 $case_width $case_height)  // vert 6
  (0            $case_width $case_height)  // vert 7

// r2
  ($r1_depth0 0           0)  // vert 8
  ($r2_depth  0           0)  // vert 9
  ($r2_depth  $case_width 0)  // vert 10
  ($r1_depth0 $case_width 0)  // vert 11
  ($r1_depth0 0           $case_height)  // vert 12
  ($r2_depth  0           $case_height)  // vert 13
  ($r2_depth  $case_width $case_height)  // vert 14
  ($r1_depth0 $case_width $case_height)  // vert 15

// r3
  ($r2_depth 0           0)  // vert 16
  ($r3_depth 0           0)  // vert 17
  ($r3_depth $case_width 0)  // vert 18
  ($r2_depth $case_width 0)  // vert 19
  ($r2_depth 0           $case_height)  // vert 20
  ($r3_depth 0           $case_height)  // vert 21
  ($r3_depth $case_width $case_height)  // vert 22
  ($r2_depth $case_width $case_height)  // vert 23

// r4
  ($r3_depth   0           0)  // vert 24
  ($r4_depth 0           0)  // vert 25
  ($r4_depth $case_width 0)  // vert 26
  ($r3_depth   $case_width 0)  // vert 27
  ($r3_depth   0           $case_height)  // vert 28
  ($r4_depth 0           $case_height)  // vert 29
  ($r4_depth $case_width $case_height)  // vert 30
  ($r3_depth   $case_width $case_height)  // vert 31

// r5
  ($r4_depth   0           0)  // vert 32
  ($r5_depth      0           0)  // vert 33
  ($r5_depth      $case_width 0)  // vert 34
  ($r4_depth   $case_width 0)  // vert 35
  ($r4_depth   0           $case_height)  // vert 36
  ($r5_depth      0           $case_height)  // vert 37
  ($r5_depth      $case_width $case_height)  // vert 38
  ($r4_depth   $case_width $case_height)  // vert 39

// plaster


);

blocks
(

    // Fluid regions
    hex (24 25 26 27 28 29 30 31) r4 ($nn_r4 $nnw $nnh) simpleGrading (1 1 1)

    // Solid regions
    hex ( 0  1  2  3  4  5  6  7) r1 ($nn_r1 $nnw $nnh) simpleGrading (1 1 1)
    hex ( 8  9 10 11 12 13 14 15) r2 ($nn_r2 $nnw $nnh) simpleGrading (1 1 1)
    hex (16 17 18 19 20 21 22 23) r3 ($nn_r3 $nnw $nnh) simpleGrading (1 1 1)
    hex (32 33 34 35 36 37 38 39) r5  ($nn_r5  $nnw $nnh) simpleGrading (1 1 1)
);

boundary
(
    inlet
    {
        type patch;
        faces
        (
          (24 25 27 26)
        );
    }

    external
    {
        type patch;
        faces
        (
            (0 3 7 4)

            (33 34 38 37)
        );
    }

    walls
    {
        type wall;
//        inGroups (externalWall);
        faces
        (
           (17 18 22 21)
        );
    }

    outlet
    {
        type patch;
        faces
        (
          (28 29 30 31)
        );
    }
);



mergePatchPairs
(
);


// ************************************************************************* //

splitMeshRegions outprint:

Region    Zone    Name
------    ----    ----
0    0    r1
1    1    r2
2    2    r3
3    3    r4
4    4    r5

Sizes of interfaces between regions:

Interface    Region    Region    Faces
---------    ------    ------    -----

Reading geometric fields

Reading volScalarField cellToRegion