Introducing diffsuion tensor in fluent
While solving mass transfer problems using Fluent, is there a way to replace the scalar diffusivity of a substance with a diffusion tensor at least in 2D? How to go about in solving such a problem? Any suggestions?

Re: Introducing diffsuion tensor in fluent
Try multicomponent diffusivity option. Its calculation is based upon StefanMaxwell formulation.
Swarup 
Re: Introducing diffsuion tensor in fluent
I can invoke the multicomponent diffusion in the material panel for the maxwellstefan equation. But then, I think the equation uses scalar D as a tensor D. How do i input the coefficients of the tensor? Is it in the form of a UDF?

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