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-   -   diffusion coefficient (http://www.cfd-online.com/Forums/cfx/112102-diffusion-coefficient.html)

bitak January 22, 2013 07:56

diffusion coefficient
 
hello.
how i can enter diffusion coefficient (m^2 s^-1) in cfx solver?
thanks

evcelica January 22, 2013 08:29

0.002 [m^2 * s^-1]
or
0.002 [m^2 / s^1]

bitak January 22, 2013 18:11

there are same, no?

evcelica January 24, 2013 17:22

yes, exactly the same, but you can do it either way.

bitak January 25, 2013 01:27

Thank you.
but infact my question is : when in article talk about diffusion coefficient, for transfer particle in the tube and calculate concentration of oarticles on tube wall, how i can enter this coeffichent in solver cfx?

evcelica January 25, 2013 02:16

You would model the scalar as an additional variable and in the domain you would enter the kinematic diffusivity of the scalar.

bitak January 25, 2013 09:07

really thank you.


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