[snappyHexMesh] Snappyhexmesh: Some parts of airfoil have a layer, others dont

maero21 · October 15, 2013, 18:09

Dear Openfoam users,

I am having a problem with snappyhexmesh. My mesh is almost as good as I want it to be, but I am experiencing a problem with the layer addition. I have attached a picture of the problem. I also have attached the snappyhexmeshdict file. Feel fry to comment on other things that are not good.

I have been playing around with featureAngle and nRelaxIter, but that did not give the desired result.

Thanks!!

Artur · October 22, 2013, 09:30

Hi,

Looking at your dict file I'd recommend, first of all:

- increasing the no. featureSnapIterations up to 20, say, just to be sure the process is complete
- increasing the featureAngle in your addLayer control up to 90 (this should ensure that as many cells are added as possible, within other constraints)

If that fails, then try:
- increasing maxFaceThicknessRatio and maxThicknessToMedialRatio
- reducing the relax and smooth iterations in addLayers to their original values
- reducing mesh quality settings, especially the minimum volume

Best of luck,

A

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October 22, 2013, 09:30		#2
Artur Senior Member Artur Join Date: May 2013 Location: Southampton, UK Posts: 372 Rep Power: 19	Hi, Looking at your dict file I'd recommend, first of all: - increasing the no. featureSnapIterations up to 20, say, just to be sure the process is complete - increasing the featureAngle in your addLayer control up to 90 (this should ensure that as many cells are added as possible, within other constraints) If that fails, then try: - increasing maxFaceThicknessRatio and maxThicknessToMedialRatio - reducing the relax and smooth iterations in addLayers to their original values - reducing mesh quality settings, especially the minimum volume Best of luck, A