[ehsan105]

hi
What is the cause of the error?


The UDF library you are trying to load (libudf) is not compiled for 3d on the current platform (win64).
The system cannot find the file specified.

C:\Users\Ehsan\libudf\win64\3d\libudf.dll


I was wondering if you could help me do that. please guid me

[pakk]

Usually Fluent gives really cryptic errors. But sometimes Fluent is really clear. This is one of the clear cases:

The UDF library you are trying to load (libudf) is not compiled for 3d on the current platform (win64).

You are trying to load a UDF which is not compiled. Either you forgot to compile, or you tried to compile it and it failed, but you didn't notice the errors showing on your screen.

[ehsan105]

Originally Posted by pakk

Usually Fluent gives really cryptic errors. But sometimes Fluent is really clear. This is one of the clear cases:

The UDF library you are trying to load (libudf) is not compiled for 3d on the current platform (win64).

You are trying to load a UDF which is not compiled. Either you forgot to compile, or you tried to compile it and it failed, but you didn't notice the errors showing on your screen.

hi
Thank you for your response
i tried to interpret this udf, but Again the error is as follows:
Error: C:\Users\Ehsan\Desktop\case DPM\DPM_BC.c: line 36: structure reference not implemented

/* reflect boundary condition for inert particles */
#include "udf.h"
DEFINE_DPM_BC(bc_reflect,p,t,f,f_normal,dim)
{
real alpha; /* angle of particle path with face normal */
real vn=0.;
real nor_coeff = 1.;
real tan_coeff = 0.3;
real normal[3];
int i, idim = dim;
real NV_VEC(x);
#if RP_2D
/* dim is always 2 in 2D compilation. Need special treatment for 2d
axisymmetric and swirl flows */
if (rp_axi_swirl)
{
real R = sqrt(P_POS(p)[1]*P_POS(p)[1] +
P_POS(p)[2]*P_POS(p)[2]);
if (R > 1.e-20)
{
idim = 3;
normal[0] = f_normal[0];
normal[1] = (f_normal[1]*P_POS(p)[1])/R;
normal[2] = (f_normal[1]*P_POS(p)[2])/R;
}
else
{
for (i=0; i<idim; i++)
normal[i] = f_normal[i];
}
}
else
#endif
for (i=0; i<idim; i++)
normal[i] = f_normal[i];
if(p->type==DPM_TYPE_INERT)
{
alpha = M_PI/2. - acos(MAX(-1.,MIN(1.,NV_DOT(normal,P_VEL(p))/
MAX(NV_MAG(P_VEL(p)),DPM_SMALL))));
if ((NNULLP(t)) && (THREAD_TYPE(t) == THREAD_F_WALL))
F_CENTROID(x,f,t);
/* calculate the normal component, rescale its magnitude by
the coefficient of restitution and subtract the change */
/* Compute normal velocity. */
for(i=0; i<idim; i++)
vn += P_VEL(p)[i]*normal[i];
/* Subtract off normal velocity. */
for(i=0; i<idim; i++)
P_VEL(p)[i] -= vn*normal[i];
/* Apply tangential coefficient of restitution. */
for(i=0; i<idim; i++)
P_VEL(p)[i] *= tan_coeff;
/* Add reflected normal velocity. */
for(i=0; i<idim; i++)
P_VEL(p)[i] -= nor_coeff*vn*normal[i];
/* Store new velocity in P_VEL0 of particle */
for(i=0; i<idim; i++)
P_VEL0(p)[i] = P_VEL(p)[i];
return PATH_ACTIVE;
}
return PATH_ABORT;
}

[ehsan105]

Originally Posted by pakk

Usually Fluent gives really cryptic errors. But sometimes Fluent is really clear. This is one of the clear cases:

The UDF library you are trying to load (libudf) is not compiled for 3d on the current platform (win64).

You are trying to load a UDF which is not compiled. Either you forgot to compile, or you tried to compile it and it failed, but you didn't notice the errors showing on your screen.

in 2d

error:
Error: C:\Users\Ehsan\Desktop\case DPM\DPM_BC.c: line 17: P_POS: undeclared variable
#f

this code for fluent help!!!

[pakk]

Now you are interpreting, but first you were compiling...

Show the error you get when you compile!

(And don't use spaces in your folder names, that confuses Fluent. So not "C:\Users\Ehsan\Desktop\case DPM", but for example "C:\Users\Ehsan\Desktop\case_DPM".)

[ehsan105]

Originally Posted by pakk

Now you are interpreting, but first you were compiling...

Show the error you get when you compile!

(And don't use spaces in your folder names, that confuses Fluent. So not "C:\Users\Ehsan\Desktop\case DPM", but for example "C:\Users\Ehsan\Desktop\case_DPM".)

tank you very much
i solved the problem.

[Hk96]

Hey I am facing a similar error. Can you tell that how did you resolve the error?