[Michael_Kay]

Hello everyone,


I am working on a simulation using interIsoFoam and trying to resolve the water surface as good as possible. I am currently importing a stl-file with snappyHexMesh to refine the area of the water surface. The stl-file is a cuboid where the upper and the lower surface have a constant z-value.
The problem is that the ground surface of the modell has a slope. The result is that the near-ground cells are positioned in different heights and not constantly along a horizontal line (I don't know how else to explain...). Thus the cells of the water surface do not have constant z values and the refinement compensates the ground slope through "stairs". The water surface is not smoothly resolved, which leads to high velocitys in those cells.



I attached an image of another example where I tried out different settings with snappyHexMesh and surfaceFeatureExtract but it didn't work out. Hope this helps to my describe my problem.


Is there away to "force" snappyHexMesh to maintain the form of the cuboid, to avoid those "stairs" and to guarantee a constant cell height?



Best regards
Michael


Fig1_refinement-stairs_stl.jpg

Fig2_refinement-stairs.jpg

Fig3_high-velocity-on-surface.jpg