diffusion coefficient
 

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

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

there are same, no?

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

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?

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

really thank you.