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Forum: FLUENT

July 14, 2011, 04:44

Replies: 12

Odd units on UDS for Isotropic Diffusion

Views: 6,463

Posted By KristianEtienne

Glad I could help! :) Regarding the...

Glad I could help! :)

Regarding the implementation for a species mass-flux at your boundaries, I believe that this is challenging. Could you maybe use Gauss-theorem to re-write your diffusive...

Forum: FLUENT

July 13, 2011, 03:08

Replies: 12

Odd units on UDS for Isotropic Diffusion

Views: 6,463

Posted By KristianEtienne

Hello again, Your attached equation (9.1-1)...

Hello again,

Your attached equation (9.1-1) is the generic UDS equation solved by FLUENT, if no modifications are made. Hence, by dimensional analysis, the diffusivity is the mass-diffusivity...

Forum: FLUENT

July 11, 2011, 13:37

Replies: 12

Odd units on UDS for Isotropic Diffusion

Views: 6,463

Posted By KristianEtienne

Hi Masoud, I assume from your question that...

Hi Masoud,

I assume from your question that you are interested in modelling an electrical potential? The electrical potential is then your "scalar", while the electrical conductivity is the...

Forum: FLUENT

January 17, 2011, 05:31

Replies: 12

Odd units on UDS for Isotropic Diffusion

Views: 6,463

Posted By KristianEtienne

Hi, The UDS equation is actually solving...

Hi,

The UDS equation is actually solving \rho\varphi, \rho being the fluid density and \varphi being your scalar.

Multiplying your "expected" units for diffusivity with density gives the...

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