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Old   April 7, 2006, 05:02
Default udf please
  #1
vijay
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Hi,

Can anybody tell me how to write a udf for pressure changing with time? It is an unsteady formulation problem.
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Old   April 7, 2006, 06:49
Default Re: udf please
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Dan
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If it's a basic function of t at an inlet you could use something like:

#include "udf.h"

DEFINE_PROFILE(inlet_x1_pressure, thread, index) { face_t f; real t = RP_Get_Real("flow-time");

begin_f_loop (f,thread) {

F_PROFILE(f,thread,index) = (some function of t) }
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Old   April 7, 2006, 06:57
Default Re: udf please
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vijay
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Hi,

Could you please elaborate your explanation. I could not understand.
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Old   April 7, 2006, 08:25
Default Re: udf please
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Dan
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It depends on how your inlet varies with time, does it obey an algebraic function or have you just got values at different points in time?
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Old   April 7, 2006, 23:48
Default Re: udf please
  #5
vijay
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Hi,

I found the problem and I could rectify it. Thanks for ur help.

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