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Old   July 19, 2006, 07:50
Default help udf !!!!
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i ran a steady flow simulation in Fluent. i know the distribution of the velocity in the domain,including the velocity inlet. That is a full development velocity in a rectangle pipe. so i want to use udf to specify the velocity distribution.

i used DEFINE_ADJUST . the interpret was ok. But iteration had a problem. Error: Floating point error: invalid number

Error Object: ()

codes are below:

#include "udf.h" DEFINE_ADJUST(adjust_velocity, domain) { real x[ND_ND];

real y;

real z; Thread *t; cell_t c; face_t f; thread_loop_c (t,domain)


begin_c_loop (c,t)



y= x[1];

z= x[2];



end_c_loop (c,t)



Can anyone help? Thanks in advance Woo
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