CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Diffusivity in porous and non-porous region (http://www.cfd-online.com/Forums/fluent/38862-diffusivity-porous-non-porous-region.html)

Leo December 7, 2005 05:53

Diffusivity in porous and non-porous region
 
I have two different regions (porous and non-porous) and would like to simulate a flow in these two regions. In the porous region, i would like to use the Bruggemann correction (Deff =D*Porosity^1.5). Can i actually specify the diffusivity via the function DEFINE_DIFFUSIVITY and using Lookup_Thread(domain, id) to specify the zone which I hope to use the bruggemann correction? Need help on this.

Thank you.


katya December 8, 2005 10:53

Re: Diffusivity in porous and non-porous region
 
yes, this is the right way.In DEFINE_Diffusivity macro you can specify different zones using the id of the zone and then for each of those zones you can return a value for the diffusion coefficient. About the correction I use that the 1/Deff=1/Dmol+1/Dkn.


All times are GMT -4. The time now is 18:42.