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Mass Diffusion Problem : How to?

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Old   October 26, 2008, 12:23
Default Mass Diffusion Problem : How to?
  #1
Rahul
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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/
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Old   October 26, 2008, 22:10
Default Re: Mass Diffusion Problem : How to?
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frank
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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.
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Old   October 27, 2008, 12:42
Default Re: Mass Diffusion Problem : How to?
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Rahul
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Thanks Frank.

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

Rahul
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Old   October 27, 2008, 15:15
Default Re: Mass Diffusion Problem : How to?
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Joao
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See tutorial 4 on CFX help, it will help you.
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