[snappyHexMesh] problem on adding boundary layers -- CFD Online Discussion Forums

September 17, 2019, 00:39

problem on adding boundary layers

xwang252

New Member

John Wang

Join Date: Mar 2013

Posts: 8

Rep Power: 13

I am using snappyHexMesh to add boundary layers.

I just found that when adding boundary layers with only ground surface selected, something strange happened that the grids at the STL edge distorted.

When selecting both ground and building surface, everything is good.

Can any expert tell the reason and solution?

P.S. Red block in the picture is the original STL geometry.

Attached Images

	before_addBoundaryLayers_p1.PNG (128.4 KB, 9 views)
	screwed_after_addBoundaryLayers_onlyGroundSurface_p1.PNG (136.2 KB, 8 views)
	good_after_addBoundaryLayers_include_bldgSurface_p1.PNG (148.4 KB, 8 views)

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