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nvarma May 20, 2014 15:02

Mass Diffusion Coefficient:
In multi-species modelling without reactions, how does fluent calculate the default value of Diffusion coefficient?

For instance, I have a case with water vapour and Nitrogen, if I choose the "constant-dilute-approx", the default value is 2.88e-5.

What is the accuracy of this value? How is this calculated?

Will it be any better if I use multicomponent method?

Any help in this regard is greatly appreciated! Even links/references would do.


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