What does "realtivSizes" mean
Hello everyone,
at the moment i am trying to get familiar with snappyHexMesh by meshing an airfoil. I created the initial Mesh with blockMesh. Each cell i created in blockMesh is 0.5m x 0.5m x 0.5m . The meshprocess didn't make any problems. But i don't understand what relativeSizes mean. addLayersControls { relativeSizes true; layers { "naca_tragflaeche" { nSurfaceLayers 10; } } expansionRatio 1.5; finalLayerThickness 0.8; minThickness 0.02; nGrow 1; featureAngle 60; nRelaxIter 5; nSmoothSurfaceNormals 1; nSmoothNormals 3; nSmoothThickness 10; maxFaceThicknessRatio 0.5; maxThicknessToMedialRatio 0.3; minMedianAxisAngle 130; nBufferCellsNoExtrude 0; nLayerIter 50; } I read that the thickness values are given as proportional to the undisorted cell size. For me that means if I have an undisorted cell size of 0.5m (in each direction) that i multiply that value with my minThickness-value of 0.02. So i would have a minThickness of 0.01m. But in my mesh the first layer is a lot smaller. If someone could explain to me what relativeSizes means that would be great. Thanks a lot for your help raw_recruit |
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