CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   negative species concentration again (http://www.cfd-online.com/Forums/fluent/36108-negative-species-concentration-again.html)

Andrew Garrard March 22, 2005 12:36

negative species concentration again
 
I asked this question before, but I didn't get an answer that I was happy with and it got washed down the list of posts, so I will post it again.

I am building my own species concentration model using a UDS. The rate of reaction is proportional to the value of the species concentration. If the initialisation conditions are such that reaction rate is sufficiently fast to cause my UDS (species concentration) to go negative after the first iteration. In the fluent species concentration model with a fast reaction rate the species concentration will NEVER go negative. Dose anyone know how fluent control this?


All times are GMT -4. The time now is 12:50.