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-   -   Transport equation for an Additional Variable (http://www.cfd-online.com/Forums/cfx/24847-transport-equation-additional-variable.html)

HariBol November 26, 2007 08:31

Transport equation for an Additional Variable
 
Hi all,

I want to solve the transport equation for an additional variable that contains only the transient and source terms. I want to do away with the diffusion and convection terms.

How can I do this?

I tried using the Diffusive Transport equation (that eliminates the convection term) and setting the diffusivity to zero. But then I see a solver error saying that the diffusivity limits are out of bounds.

How should I trick CFX into solving what I want

Jim November 26, 2007 08:51

Re: Transport equation for an Additional Variable
 
Try setting it to something stupidly small like 1e-50 m2/s.

J November 26, 2007 17:07

Re: Transport equation for an Additional Variable
 
What you are trying to do, isn't that just equal to integrating your source term in time? Depending on your source term you might even do this analytically.


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