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-   -   Mass Diffusion Problem : How to? (http://www.cfd-online.com/Forums/cfx/26570-mass-diffusion-problem-how.html)

Rahul October 26, 2008 12:23

Mass Diffusion Problem : How to?
 
Hi all,

I want to simulate mass diffusion in a porous media. I was able to do a fluid flow simulation but could not figure out how to model a diffusion problem (for example diffusion of dye in water). I am interested in plotting concentration vs. time at the outlet until influent concentration level is reached.

Please guide me through this problem. I have beginner level skills st CFX, so any help would be very helpful.

Thanks, Rahul

P.S Here's the link to the geometry I'm working with. http://www.flickr.com/photos/3178316...40591/sizes/o/

frank October 26, 2008 22:10

Re: Mass Diffusion Problem : How to?
 
I think you can consider use additional variable to deal with this problem. just use poission equation or diffusive transport equation. good luck to you.

Rahul October 27, 2008 12:42

Re: Mass Diffusion Problem : How to?
 
Thanks Frank.

I have never used additional variables, but I'll work on it.

Rahul

Joao October 27, 2008 15:15

Re: Mass Diffusion Problem : How to?
 
See tutorial 4 on CFX help, it will help you.


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