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turbulence model in internal combustion engine

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Old   December 4, 2006, 19:01
Default turbulence model in internal combustion engine
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George
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Hello, I have written a source code simulating 3D flow in an internal combustion engine (curvilinear, unsteady, compressible, turbulent). Until now I have incorporated the standard k-epsilon turbulence model and the RNG k-epsilon. Except from LES and RSM, which other turbulence model is the better for in-cylinder simulation? What about non-linear k-epsilon models?

When I use the RNG model, the code converges much more slowly than with the standard k-e model (50% more iterations). Is this expected?

Thank you in advance
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