# Convert Euler code to full N-S

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 June 23, 2002, 16:01 Convert Euler code to full N-S #1 Soren Guest   Posts: n/a Sponsored Links Hi Simpel question: What are needed in terms of code midification when I want to convert a Euler code to simulate incompressible N-S with k-eps turbulence model ? Thanks in advance. Regards Soren

 June 24, 2002, 02:46 Re: Convert Euler code to full N-S #2 Rami Guest   Posts: n/a Dear Soren, The question is indeed simple - the answer is not... o You have to include the viscous terms in the transport equations; o You should add the k-e transport equations (after deciding if you need the high- or low- Re model, and exactly which variant of the k-e family); o You should allow for BC treatment including viscosity (e.g., no slip at walls) and appropriate BC for k-e (either by corresponding wall functions or direct approach resolving the viscous sublayer); o You should choose an appropriate algorithm to allow for the incompressibility constraint (e.g., SIMPLE-like or artificial comressibility); o You should adapt or modify altogether the discretization and numerical solution algorithm to allow stable and accurate solution to the full N-S equations system; o and more... (e.g., treatment of additional inputs, additional output, further submodels, like the viscosity variaton with temperature). I assume that if you do such a conversion, there will be little resemblance between the final and the original codes.

 June 24, 2002, 02:49 Re: Convert Euler code to full N-S #3 Rajani Kumar Akula Guest   Posts: n/a just add the additional terms explicitly.

 June 25, 2002, 04:47 Re: Convert Euler code to full N-S #4 Li Yang Guest   Posts: n/a Hi Soren, I think it would be a very big job for you to implement all these. I suggest that you should get such a code from an expert in CFD or have a check the book from Ferziger and Peric. Regards Li

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