[rubenparedes]

Dear all,


I am meshing a submarine using SHM that I want to simulate it on surface and near-surface conditions. I want to identify turbulent flow regions on the hull. After some iterations playing with SHMdict parameters, I was able to get a 97% of BL thickness around the hull. However, It looks like not enough layers are added at the aft and sail sections, see attached images.

I am using the following settings for the layer addition:

    relativeSizes true;
    layers { hull {nSurfaceLayers 15;}}
    expansionRatio 1.3;
    finalLayerThickness 0.5;
    minThickness 1e-10;
    nGrow 0;


    // Advanced settings
    featureAngle 180;  
    nRelaxIter 5;
    nSmoothSurfaceNormals 50; 
    nSmoothNormals 50; 
    nSmoothThickness 10; 
    maxFaceThicknessRatio 0.8; 
    maxThicknessToMedialRatio 0.9;
    minMedianAxisAngle 90; 
    nBufferCellsNoExtrude 0;
    nLayerIter 50;
    nRelaxedIter 20;

Also, I am using the following mesh quality parameters:

maxNonOrtho 70;
maxBoundarySkewness 20; 
maxInternalSkewness 4;  
maxConcave 80; 
minVol -1e30;  
minTetQuality -1e30; 
minArea -1e30;
minTwist 0.05;
minDeterminant 1e-6;
minFaceWeight 0.05;
minVolRatio 0.01;
minTriangleTwist -1;

// Advanced
nSmoothScale 4;
errorReduction 0.75;

Maybe I am missing something here, but I have reviewed some SHM tutorials and I am still not able to improve it.

Is there a way to improve this BL?

Any help is appreciated.

Thanks in advance,


Ruben