mesh coarsening using openfoam

owayz · June 10, 2011, 09:54

I have a typical problem that alot of people would have with mesh generation. I love hexahedral meshing for their good quality results. But as soon as I go towards thin boundary layers there is a huge penalty that I have to pay, in terms of mesh size.

Quickly I would like to say that I am looking for ways to coarse my mesh. Like if I have a hex mesh and I would like to coarse that mesh in certain regions is it possible.!!!
If so kindly give me some ideas and Hints..!

Arnoldinho · June 11, 2011, 07:06

I'm not sure if mesh coarsening is possible with OF.
Why don't you think the way round: Make a general coarse mesh and refine it if needed. For refinement, you can have a look at refineMesh (using refineMeshDict and cellSetDict) and refineWallLayer (to add boundary layers to patches). Also, snappyHexMesh uses area refinement and layer addition. Using blockMesh, you could also generate mesh blocks with different grid resolutions and stitch them together...

June 10, 2011, 09:54	mesh coarsening using openfoam	#1
owayz Senior Member Awais Ali Join Date: Feb 2010 Location: Germany Posts: 128 Rep Power: 17	I have a typical problem that alot of people would have with mesh generation. I love hexahedral meshing for their good quality results. But as soon as I go towards thin boundary layers there is a huge penalty that I have to pay, in terms of mesh size. Quickly I would like to say that I am looking for ways to coarse my mesh. Like if I have a hex mesh and I would like to coarse that mesh in certain regions is it possible.!!! If so kindly give me some ideas and Hints..!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Cross-compiling OpenFOAM 1.7.0 on Linux for Windows 32 and 64bits with Mingw-w64	wyldckat	OpenFOAM Announcements from Other Sources	3	September 8, 2010 07:25
[snappyHexMesh] external flow with snappyHexMesh	chelvistero	OpenFOAM Meshing & Mesh Conversion	11	January 15, 2010 20:43
[Technical] Mathematical exact definition of mesh quality measures in OpenFOAM checkMesh utility	albcem	OpenFOAM Meshing & Mesh Conversion	1	October 31, 2008 05:12
Moving unstructured mesh with changing topology	meaton	OpenFOAM Running, Solving & CFD	6	April 27, 2008 08:56
Icemcfd 11: Loss of mesh from surface mesh option?	Joe	CFX	2	March 26, 2007 19:10

June 11, 2011, 07:06		#2
Arnoldinho Senior Member Arne Stahlmann Join Date: Nov 2009 Location: Hanover, Germany Posts: 209 Rep Power: 18	I'm not sure if mesh coarsening is possible with OF. Why don't you think the way round: Make a general coarse mesh and refine it if needed. For refinement, you can have a look at refineMesh (using refineMeshDict and cellSetDict) and refineWallLayer (to add boundary layers to patches). Also, snappyHexMesh uses area refinement and layer addition. Using blockMesh, you could also generate mesh blocks with different grid resolutions and stitch them together...