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exponential source term

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Old   July 4, 2008, 11:11
Default exponential source term
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Hi all I define source term to uds function in fluent.the source term is function of uds variable. my udf is :

DEFINE_SOURCE(s_auds,c,t,dS,eqn) { real source; source =exp(C_UDSI(c,t,0)); dS[eqn] = exp(C_UDSI(c,t,0)); return source; }

however it dont converg, why it divergent ? thanks all. Pourak
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