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-   -   HELP!How to define this kind of inlet concentration in transient solver? (http://www.cfd-online.com/Forums/fluent-udf/110916-help-how-define-kind-inlet-concentration-transient-solver.html)

legendyxg December 25, 2012 23:19

HELP!How to define this kind of inlet concentration in transient solver?
 
Dear all,

I run a transient simulation of species transport, and the concentration of each species at the flow inlet should be prescribed according to the following relation:

dc_in/dt = A*(c_out - c_in),

where A is a constant, c_in and c_out are the average values of concentration at the inlet and outlet boundary. How to write this kind of relation (dc_in/dt = ...) in UDF?

Thand you very much!

Jack


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