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Andrew February 23, 2004 08:20

Realizable and Standard K-E Difference
I am wondering if anyone can point me to a reference or could explain to me the main differences between the realizable and the standard k-epsilon model, in respect of modelling a two dimensional mixing elbow as is available in the Fluent tutorial.

And in your personal opinion which you would recommend and why?

Thank you


Tim P. February 24, 2004 16:33

Re: Realizable and Standard K-E Difference
Here is the reference of the people that made the model:

SHIH, T-H., LIOU, W. W., SHABBIR, A., YANG, Z. ZHU, J. 1995. A new k-e eddy viscosity model for high Reynolds number turbulent flows. Computers & fluids. 24: 227-238.

Here is a reference of an application of the model:

CHAN, T. L., DONG, G., LEUNG, C. W., CHEUNG, C. S. and HUNG, W. T. 2002. Validation of a two-dimensional pollutant dispersion model in an isolated street canyon. Atmospheric environment. 36: 861-872.

I've found that the realizable ke has slightly more agreeable results than ske and takes about the same amount of time for iteration (compared to RNG). I think the main difference is that the eddy viscosity coefficient is calculated rather than used from a constant.

Hope this helps.

Cheers, Tim.

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