CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Re: UDF(urgent)

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   October 24, 2003, 19:17
Default Re: UDF(urgent)
  #1
li li
Guest
 
Posts: n/a
Hi, I am using the interpreted UDF in Fluent 6.0.12. The following code is from section 4.3.12(UDF manual). I got error information as following:

line 17: THREAD_STORE: undeclared variable

Can anybody tell me what this means?

Any help will be appreciated.

Li

/************************************************** ********************/ /* UDF that implements a simplified advective term in the */ /* scalar transport equation */ /************************************************** ********************/

#include "udf.h"

DEFINE_UDS_FLUX(my_uds_flux, f, t, i) { Thread *t0, *t1 = NULL; cell_t c0, c1 = -1;

real NV_VEC(psi_vec), NV_VEC(A);

/* neighboring cells of face f, and their (corresponding) threads */

t0 = F_C0_THREAD(f,t); c0 = F_C0(f,t);

if (NULL != F_C1_THREAD(f,t)) /* Alternative: if (! BOUNDARY_FACE_THREAD_P(t)) */

{

t1 = F_C1_THREAD(f,t);

c1 = F_C1(f,t);

} else

{

t1 = NULL;

c1 = -1;

}

/* If Face lies at domain boundary, use face values; */ /* If Face lies IN the domain, use average of adjacent cells. */

if (NULL == t1) /* Alternative: if (BOUNDARY_FACE_THREAD_P(t)) */

{

NV_D(psi_vec, =, F_U(f,t), F_V(f,t), F_W(f,t));

NV_S(psi_vec, *=, F_R(f,t));

} else

{

NV_D(psi_vec, =, C_U(c0,t0), C_V(c0,t0), C_W(c0,t0));

NV_D(psi_vec, +=, C_U(c1,t1), C_V(c1,t1), C_W(c1,t1));

NV_S(psi_vec, /=, 2.); /* averaging. */

NV_S(psi_vec, *=, (((C_R(c0,t0) + C_R(c1,t1)) / 2.)));

}

/* Now psi_vec contains our "psi" from above. */ /* Next, get the face normal vector: */

F_AREA(A, f, t);

/* Finally, return the dot product of both. */ /* Fluent will multiply the returned value */ /* by phi_f (the scalar's value at the face) */ /* to get the "complete" advective term... */

return NV_DOT(psi_vec, A); }

  Reply With Quote

Old   October 25, 2003, 00:08
Default Re: UDF(urgent)
  #2
li li
Guest
 
Posts: n/a
HI,

Will it be helpful if I use compiled UDF?

Best regards.

Li
  Reply With Quote

Old   October 25, 2003, 00:52
Default Re: UDF(urgent!!!!!)
  #3
li li
Guest
 
Posts: n/a
Can anyone help me with this problem?

Best regards, Li
  Reply With Quote

Old   October 29, 2003, 12:25
Default Re: It works out.
  #4
li li
Guest
 
Posts: n/a
Hi, Using compiled UDF is the solution. Maybe my lesson will help someone else.

Li
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 07:32.