[snappyHexMesh] Error in the construction of boundary layers

KAYANO · May 7, 2021, 05:20

Hello everyone!

There was an error in drawing boundary layers. I set the parameters as indicated below, but the boundary layers are not drawn. The complete log from snappyHexMesh and the file itself are shown below.

Jack B · May 10, 2021, 08:39

Hi Kayano,

Let me point you to these threads where a similar problem are seen, Layer Addition and Prism Layers Not Generating.
Layer addition problems are really common in snappyHexMesh and other open source meshers.
I would suggest you start by checking out the links and increasing your feature angle to something like 130 and by switching off your tet quality setting in the mesh quality settings (minTetQuality -1e-30).
Good luck

AtoHM · May 11, 2021, 12:16

Looks like addLayers is turned off completely. Check at the start of snappyHexMeshDict.

KAYANO · May 13, 2021, 15:40

Thanks everyone, found a bug. The problem was the ratio. Set to 1.1

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May 10, 2021, 08:39		#2
Jack B New Member Jack B Join Date: Jul 2018 Posts: 11 Rep Power: 7	Hi Kayano, Let me point you to these threads where a similar problem are seen, Layer Addition and Prism Layers Not Generating. Layer addition problems are really common in snappyHexMesh and other open source meshers. I would suggest you start by checking out the links and increasing your feature angle to something like 130 and by switching off your tet quality setting in the mesh quality settings (minTetQuality -1e-30). Good luck

May 11, 2021, 12:16		#3
AtoHM Senior Member M Join Date: Dec 2017 Posts: 644 Rep Power: 12	Looks like addLayers is turned off completely. Check at the start of snappyHexMeshDict.

May 13, 2021, 15:40		#4
KAYANO New Member Dmitry Join Date: Sep 2018 Posts: 12 Rep Power: 7	Thanks everyone, found a bug. The problem was the ratio. Set to 1.1