Specify refinement region directly during run time?

Taozi · July 27, 2015, 18:06

Dear All,

I am wondering if it's possible to programically control the region of mesh refinement. Suppose you have a moving object and you can obtain it's location (x, y, z) at anytime, then can you directly specify in code a region around this object (like (x-1, y-1, z-1) to (x+1, y+1, z+1)) to be refined to a certain level n?
I think by default the mesh refinement region is based on certain criteria specified by the user (mostly gradient of something), but in some cases all details in a certain region are needed, like the one I mentioned. In addition, I guess directly specifying the region is faster as it saves OpenFOAM from finding the region numerically.
Any discussion or suggestion is welcomed!

Regards,
Taozi

Taozi · July 28, 2015, 11:51

I will answer my own question, I just realized that I can create a separate volScalarField and let dynamic mesh use this field to refine the mesh, and this field can be updated arbitrarily -- such as using a changing location.

July 27, 2015, 18:06	Specify refinement region directly during run time?	#1
Taozi New Member Chenguang Zhang Join Date: Jul 2012 Location: Baton Rouge Louisiana Posts: 15 Rep Power: 15	Dear All, I am wondering if it's possible to programically control the region of mesh refinement. Suppose you have a moving object and you can obtain it's location (x, y, z) at anytime, then can you directly specify in code a region around this object (like (x-1, y-1, z-1) to (x+1, y+1, z+1)) to be refined to a certain level n? I think by default the mesh refinement region is based on certain criteria specified by the user (mostly gradient of something), but in some cases all details in a certain region are needed, like the one I mentioned. In addition, I guess directly specifying the region is faster as it saves OpenFOAM from finding the region numerically. Any discussion or suggestion is welcomed! Regards, Taozi

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July 28, 2015, 11:51		#2
Taozi New Member Chenguang Zhang Join Date: Jul 2012 Location: Baton Rouge Louisiana Posts: 15 Rep Power: 15	I will answer my own question, I just realized that I can create a separate volScalarField and let dynamic mesh use this field to refine the mesh, and this field can be updated arbitrarily -- such as using a changing location.