[Fredvol]

Hello ,


Using cfMesh , I wondering how can I smooth the transition in thickness between the top boundary layer cell and the first cell of the mesh ?

I mean it looks like my boundary layer is always one mesh size thick , and it is divide by the number of layer I ask. So teh transistion is size is big.

Please find attach a picture , with 5 and 15 layers. Overall thickness looks the same.

Reading the user Guide I tried to play with the parameters: featureSizeFactor and relThicknessTol . But without sucess.

I found this thread, but it doesn't give me the answer.
boundary layers



What tricks do you use?


Thanks in advance.


Special thanks to franjo_j ans the CfMesh developers.



Fred


ps: Here my boundarylayer MeshDict:

boundaryLayers
{
   

//       untangleLayers 0;
 
    patchBoundaryLayers
    {
        w_wall
        {
            nLayers  1;
            thicknessRation 1.1;
             allowDiscontinuity  1;
        }

    }
     optimiseLayer             1;       

    optimisationParameters
    {
        nSmoothNormals             5;       
        relThicknessTol         0.15;        
        featureSizeFactor         0.4;       
        reCalculateNormals         1;        
        maxNumIterations         5;   
    }

}