No grid adaptation

Pimmie80 · September 21, 2010, 07:42

Hello,

I'm doing a steady simulation with prescribed velocity values at every node of the velocity-inlet boundary. After convergence, less nodes are found on the inlet boundary and the prescribed velocity values have altered slighly, resulting in lower Reynolds number than I put in the simulation, while I want the inlet to remain exactly as I prescribed it. I think this is due to the mesh adaptation that FLUENT performs automatically. My question therefore is: Can I switch off all adaptation options in FLUENT? No Refinening or coarsening, not on boundaries, no gradient adaptation, etc. I tried to switch everything under Adapt off, but nothing worked so far. Thanks for your help!

Trev · September 21, 2010, 09:35

Look in the fluent manual how to adapt using a mask so you can prescribe which regions can or can't be refined/coarsened. Turn off dynamic mesh adaption and do it manually so you have more control over the mesh.

Neil

September 21, 2010, 07:42	No grid adaptation	#1
Pimmie80 New Member Pim van Ooij Join Date: Sep 2010 Posts: 1 Rep Power: 0	Hello, I'm doing a steady simulation with prescribed velocity values at every node of the velocity-inlet boundary. After convergence, less nodes are found on the inlet boundary and the prescribed velocity values have altered slighly, resulting in lower Reynolds number than I put in the simulation, while I want the inlet to remain exactly as I prescribed it. I think this is due to the mesh adaptation that FLUENT performs automatically. My question therefore is: Can I switch off all adaptation options in FLUENT? No Refinening or coarsening, not on boundaries, no gradient adaptation, etc. I tried to switch everything under Adapt off, but nothing worked so far. Thanks for your help!

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September 21, 2010, 09:35		#2
Trev Member Neil Join Date: Jun 2009 Location: The Moon Posts: 42 Rep Power: 17	Look in the fluent manual how to adapt using a mask so you can prescribe which regions can or can't be refined/coarsened. Turn off dynamic mesh adaption and do it manually so you have more control over the mesh. Neil