[mesh manipulation] Successive refinements?

badoumba · August 10, 2017, 05:24

Hello,

Is it possible to successively refine existing mesh generated by SHM?
meshing > solving > refining > solving > refining ...

Thanks for sharing

a_slow_old_man · September 1, 2017, 01:11

If you make a seperate case for each "refined" mesh you should be good.

See U-33 to U-35 in the OpenFOAM User Guide

You just replace the refineMesh with a snappyHexMesh job

Dreoasteh · September 20, 2017, 05:28

A good approach is to increase the cell count in blockMesh, that way the path snappyHexMesh takes is maintained. This is specially useful if you are doing grid independence studies.

Just take care because if you want to double the number of cells in your final mesh, (i.e. if your initial blockMesh was (10 10 10) and you want to go from 1M cells to 2M cells) you have to multiply each direction by cube root of 2. Don't be like me and multiply each direction by 2!

If this is your approach you can just write a bash script to concatenate the progressive refinements.

Hope it helps

August 10, 2017, 05:24	Successive refinements?	#1
badoumba Member badoumba Join Date: Aug 2013 Posts: 68 Rep Power: 12	Hello, Is it possible to successively refine existing mesh generated by SHM? meshing > solving > refining > solving > refining ... Thanks for sharing

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September 1, 2017, 01:11		#2
a_slow_old_man New Member Frederik Join Date: Dec 2015 Location: Germany Posts: 25 Rep Power: 10	If you make a seperate case for each "refined" mesh you should be good. See U-33 to U-35 in the OpenFOAM User Guide You just replace the refineMesh with a snappyHexMesh job

September 20, 2017, 05:28		#3
Dreoasteh Member Marc Join Date: May 2017 Posts: 42 Rep Power: 8	A good approach is to increase the cell count in blockMesh, that way the path snappyHexMesh takes is maintained. This is specially useful if you are doing grid independence studies. Just take care because if you want to double the number of cells in your final mesh, (i.e. if your initial blockMesh was (10 10 10) and you want to go from 1M cells to 2M cells) you have to multiply each direction by cube root of 2. Don't be like me and multiply each direction by 2! If this is your approach you can just write a bash script to concatenate the progressive refinements. Hope it helps