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Old   June 27, 2005, 08:10
Default Advection term
  #1
Juan
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Hi everybody.

I making a simulation of a simple flow at low reynolds number and I would like to know if it's possible to get rid of the advection term in the NS equation (i.e. the left-hand side)? (Just for checking something) Is there an option for that in CFX 5.7.1??

Thanks Juan
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Old   June 27, 2005, 16:20
Default Re: Advection term
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Robin
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You can solve an additional variable with diffusion only. Is this what you need?

-Robin
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Old   June 28, 2005, 03:55
Default Re: Advection term
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Juan
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Yes. But I don't know how to do it, and is it the only way to do that?
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Old   June 28, 2005, 13:48
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Rui
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Hi,

If you have access to the CFX-Community forum, take a look at:

http://www-waterloo.ansys.com/cfxcom...p?TOPIC_ID=968

http://www-waterloo.ansys.com/cfxcom...p?TOPIC_ID=744

I think you have to define a Transport Equation for the additional variable on the Domain window in CFX-Pre. Then you have to edit the .def file and overwrite the option Transport Equation with Diffusive Transport Equation or Poisson Equation. But these options are not in the documentation, so perhaps you should contact CFX support and ask them what they exactly mean.

Regards,

Rui
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Old   June 29, 2005, 03:54
Default Re: Advection term
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Juan
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Ok, thank you. I'll try that. Regards, Juan
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