This is a simple UDF used to define the inlet velocity profile. It is compliled and linked correctly both in single CPU Windows machine and SGI 8 CPU Irix workstation. But when it is used in 2 CPU Windows server, it could not linked properly after being passed the compilation. Fluent prompts could not find the path of the UDF library. Who can tell me how to solve this proplem? Thanks in andvace.

#include "udf.h"

DEFINE_PROFILE(inlet_x_velocity,thread,index)

{

real x[ND_ND];

real z;

face_t f;

begin_f_loop(f,thread)

{

F_CENTROID(x,f,thread);

z=x[2];

F_PROFILE(f,thread,index)=0.511*log((z+0.000225)/0.000225)/0.42;

}

end_f_loop(f,thread)

}

You have to build your library with your case already running in paralell. So launch your case in paralell, cmpiled and save and it will work. Thomas

I find where the prolblem occurs. In the process of compiling UDF, it should specify the full path of the UDF library,not just the default libray name. Thank you for your reply.