Volume Mesh

cfMesh is used for volume mesh. It’s fast and gives great hex-dominated meshes with prism layers.

For this bend I just took the setup from one of the tutorials that comes with cfMesh: “tutorials/cartesianMesh/elbow_90degree”.

Then some things had to be adjusted for this case in the system/meshDict file:

/--------------------------------- C++ -----------------------------------\
 | =========                 |                                                |
 | \      /  F ield         | cfMesh: A library for mesh generation          |
 |  \    /   O peration     |                                                |
 |   \  /    A nd           | Author: Franjo Juretic                         |
 |    \/     M anipulation  | E-mail: franjo.juretic@c-fields.com            |
 *---------------------------------------------------------------------------*/
 FoamFile
 {
     version   2.0;
     format    ascii;
     class     dictionary;
     location  "system";
     object    meshDict;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 surfaceFile "bend.stl";
 minCellSize 15.0;
 maxCellSize 25.0;
 boundaryCellSize 25.0;
 localRefinement
 {
     "ringArea.*"
     {
         cellSize 0.2;
     }
 }
 boundaryLayers
 {
     nLayers 0;
    thicknessRatio 1.1;
 maxFirstLayerThickness 2.5;
 patchBoundaryLayers {
   wall
    {
     nLayers 5;
     thicknessRatio 1.2;
     maxFirstLayerThickness 2.5;
   }
 }
 }
 renameBoundary
 {
     defaultName     fixedWalls;
     defaultType     wall;
 newPatchNames
 {
     "inlet.*"
     {
         type    patch;
         newName inlet;
     }
     "outlet.*"
     {
         type    patch;
         newName outlet;
     }
 }
 }
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //