fvSchemes Setting for tracer flow

spv24 · April 20, 2012, 04:59

Hello,

At the moment I am experimenting with good solver settings, especially for the fvSchemes to simulate the distribution of a tracer gas in a flow. I would like to minimize the effects of numerical diffusion. At the moment the best results so far are when using SFCD as div interpolation schemes.

I am primirarily doing PIMPLE calculations with stationary boundary conditions of compressible flows using both turbulence models: laminar and k-Epsilon.

Did anyone do such things before and knows good solver settings to share?

Are there any special advices for the mesh besides the requirement that it should to very fine to minimize the numerical diffusion as well?

Thanks,

Sammy

alberto · April 21, 2012, 15:12

If possible, use a central scheme (linear or cubic), respecting its stability condition. High-order gradients (leastSquares or fourth) are a good idea too.

April 20, 2012, 04:59	fvSchemes Setting for tracer flow	#1
spv24 New Member Samuel Vogel Join Date: Mar 2009 Posts: 20 Rep Power: 17	Hello, At the moment I am experimenting with good solver settings, especially for the fvSchemes to simulate the distribution of a tracer gas in a flow. I would like to minimize the effects of numerical diffusion. At the moment the best results so far are when using SFCD as div interpolation schemes. I am primirarily doing PIMPLE calculations with stationary boundary conditions of compressible flows using both turbulence models: laminar and k-Epsilon. Did anyone do such things before and knows good solver settings to share? Are there any special advices for the mesh besides the requirement that it should to very fine to minimize the numerical diffusion as well? Thanks, Sammy

April 21, 2012, 15:12		#2
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 36	If possible, use a central scheme (linear or cubic), respecting its stability condition. High-order gradients (leastSquares or fourth) are a good idea too. __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

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