[snappyHexMesh] Mesh alignment

gustavoliveira · June 11, 2023, 20:33

Hi,

How can I align a mesh over a plane? For example, in this attached image, I used snappyHexMesh, but I would like the cell faces to align with the red line. Some of them are not aligned, for example, in the yellow circle.

Thanks

AtoHM · June 12, 2023, 05:17

Untested: It should be possible to add a searchablePlane (https://www.openfoam.com/documentati...ableplane.html) in the geometry section. Then also make an entry for this region in the refinementSurfaces section of snappyHexMeshDict. This should cause snappy to snap nearby cells to the plane and keep them in place.

But keep in mind, the shifting you see there is caused by the layer introduction step. Keeping the cells at the plane frozen, may lead to worse quality or fewer layers being generated because the required quality can not be maintained.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[snappyHexMesh] Add Mesh Layers doesnt work on the whole surface	Kryo	OpenFOAM Meshing & Mesh Conversion	13	February 17, 2022 08:34
decomposePar problem: Cell 0contains face labels out of range	vaina74	OpenFOAM Pre-Processing	37	July 20, 2020 06:38
[ICEM] 2D hybrid mesh (unstructured mesh highly dependent on structured mesh parameters)	shubham jain	ANSYS Meshing & Geometry	1	April 10, 2017 06:03
[ICEM] Generating Mesh for STL Car in Windtunnel Simulation	tommymoose	ANSYS Meshing & Geometry	48	April 15, 2013 05:24
fluent add additional zones for the mesh file	SSL	FLUENT	2	January 26, 2008 12:55

June 12, 2023, 05:17		#2
AtoHM Senior Member M Join Date: Dec 2017 Posts: 703 Rep Power: 13	Untested: It should be possible to add a searchablePlane (https://www.openfoam.com/documentati...ableplane.html) in the geometry section. Then also make an entry for this region in the refinementSurfaces section of snappyHexMeshDict. This should cause snappy to snap nearby cells to the plane and keep them in place. But keep in mind, the shifting you see there is caused by the layer introduction step. Keeping the cells at the plane frozen, may lead to worse quality or fewer layers being generated because the required quality can not be maintained.