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October 22, 2010, 12:54 |
finding noise of flow by dns simulation
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Senior Member
Mohammad
Join Date: Feb 2010
Location: Shiraz, Iran
Posts: 108
Rep Power: 16 |
Dear everyone,
I'm a master student and I had chosen OpenFoam as the cfd software for my thesis. I want to find the flow noise induced and specifically the noise of cavitation bubbles when they collapse. as first step I tried to find the turbulence noise by running dnsfoam. I encountered some problems and these are the main questions I have: 1- why the grid size on all of edges must be a power of 2? is this mean that i cant have an unstructured or multiple-block structured grid? how about multiple connected regions like a domain around a body? 2- what is the turbulence constants in turbulenceProperties?(I know they are just for initialize the turbulence but I don't know how can I find their value for my case) 3- what is the real order of discretization of equations? is it just as I choose in fvScheme->interpolation like linear=2,QUICK=4,...? I'm looking forward for someones help... Mohammad |
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discretization, dns, dnsfoam, noise, turbulence |
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