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-   -   blockMesh for 20M grids, stuck forever? Help! (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/122170-blockmesh-20m-grids-stuck-forever-help.html)

ripperjack August 13, 2013 16:41

blockMesh for 20M grids, stuck forever? Help!
 
Hi guys,

I want to generate mesh with 20 million grid points using blockMesh. However, I tried for many times and I failed. I uses blockMesh and now it has taken for more than 5 hours, and the mesh is not successfully generated, I am still waiting..... Could you guys tell me is there a better way to generate big mesh using blockMesh? Thanks!

nimasam August 14, 2013 01:14

well you may want to generate your mesh with coarser mesh, then using refineHexMesh or refineMesh, to make it refine to the level you want

kwardle August 21, 2013 10:58

refineHexMesh can also be run in parallel, so you could make a mesh with blockMesh, decomposePar, and then refine in parallel to your desired level.

Bernhard August 21, 2013 11:36

How much RAM memory do you got on your machine? Probably blockMesh is eating everything, and evading to some swap-memory, which makes it terribly slow. If this is the case, try running on a machine with more RAM.


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