[768643480]

Hi, I defined the inlet velocity as below,
#include "udf.h"
DEFINE_PROFILE(unsteady_velocity,thread,position)
{
#if !RP_HOST
real pos[ND_ND];
real x,y;
face_t f;
real DH=0.02;
real F=2400.;
real t=RP_Get_Real("flow-time");
begin_f_loop(f,thread)
{
F_CENTROID(pos,f,thread);
y=pos[1];
F_PROFILE(f,thread,position)=(0.01568+0.00784*sin( 2.*3.14159*F*0.00001568*t/DH/DH))*2.*(1.-4.*y*y/DH/DH);
}
end_f_loop(f,thread)
#endif
}

I can run the case in parallel by gui, and on the command line outside the batch system, the UDF will work in these two situations. but every time I run the case in parallel by batch file(I had to use batch file in current system for a long iterations), errors will appear.
Reading "zhgxsin600try-p.dat"...
Parallel variables...
Error: chip-exec: function "unsteady_velocity" not found.
Error: chip-exec: function "unsteady_velocity" not found.
Error: chip-exec: function "unsteady_velocity" not found.
Error: chip-exec: function "unsteady_velocity" not found.
Done.
The case could run, but the inlet velocity will keep zero.

Dese there anybody could give me some suggestions to correct my error? Thanks a lot.

[`e`]

Sounds like the batch process for Fluent couldn't find your boundary condition UDF. Are you sure the UDF has compiled and loaded successfully?

[pakk]

Could it be that in you gui test it is single precision, and in the batch test it is double precision or vice versa?