Can anyone help me to write UDF code for variable heatflux depending on Z coordinate ?

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Filippo Maria Denaro

If your question is only focused on programming the UDF for Fluent, I suggest to ask in the proper Fluent subsection in the cfd-online forum.

Aissa Walid Benarous

you need some initial condition

Martin Kubicek

I would split the Z abscissa into two parts. The first one shall be something like q=c0+c1*e^(c2*z) where z = (-inf, value ) and the second part shall be q=c0+c1*1/z or you can do q=c0+e^(-c1*z) where z = (valuem, inf ).

Minh Doan

Martin Kubicek Thank you for your help, i know how to find the equation of the curve but i dont really know how to write this udf profile. Is presents some error in heat flux distribution along z axis. Can u help me ?

Filippo Maria Denaro thank you for your suggestion, i will post another post soon

Sorry not familiar with udf profile writting. Hence, I cannot help :(