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pollution disperion urban canyon

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Old   December 26, 2009, 14:56
Default pollution disperion urban canyon
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Hi guys,

Right now I am simulating pollution dispersion in an urban canyon. I having some problems when i run it in fluent. Attach here is the pic of the urban canyon i am trying to solve. What i want to do is to disperse a co2 source at the center of the bottom of the pic. I have tried doing species transport but there is no coordinate to refer to for my dispersion. How can I solve this in fluent. Many thanks in advance.
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Old   January 1, 2010, 15:01
Default pollution dispersion
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Hi there,
what are the symmetry planes doing inside the computational domain? periodic bc are mentioned ok..do the symmetry planes belong there?

The geometry you have is simply a nice 3D backward and forward facing step profile..should be easily to track co2 particles here..

You do not need species transport..rather do a scalar transport modeling ..its straightforward using Fluent's manual.

Just to make sure you get good flow convergence - try running the problem with no scalars (co2 fraction) and compare with some literature data for 3D flow over these step like boundaries.


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Quote:
Originally Posted by done_87 View Post
Hi guys,

Right now I am simulating pollution dispersion in an urban canyon. I having some problems when i run it in fluent. Attach here is the pic of the urban canyon i am trying to solve. What i want to do is to disperse a co2 source at the center of the bottom of the pic. I have tried doing species transport but there is no coordinate to refer to for my dispersion. How can I solve this in fluent. Many thanks in advance.
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