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natantyt November 19, 2011 20:17

Diffusion Equaton Fluent

I want to model a pure mass diffusion equation (laplace Equation) with certain concentration and the inlet and outlet of a cube geometry.

How can I do that without having a concentration gradient from outlet toward the centre of the geometry.What should be the boundary conditions?

How can I calculate the molar diffusion flux at the inlet. The flux part of the Fluent can not be use because I set velocity as zero in the boundary conditions.


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