[vekh]

Hello!
I want to write UDF which will return coordinates of specific VoF fraction - let say alpha from = 0.5 to 0.55. I wrote UDF with use of C_VOF(cell, pt[]) but there was an error message label "store_vof_norm" not found.
Then I was try to interpret UDF from Ansys manual:

/*******************************************************************
   This UDF is an implementation of the degassing boundary condition
*******************************************************************/
 
 #include "udf.h"
 #include "sg.h"
 #include "sg_mphase.h"
 #include "flow.h"
 #include "mem.h"
 #include "metric.h"
 
 DEFINE_SOURCE(degassing_source, cell, thread, dS, eqn)
 {
    real source;
    Thread *tm = THREAD_SUPER_THREAD(thread);
    source = -C_R(cell,thread)*C_VOF(cell,thread)/CURRENT_TIMESTEP ;
    C_UDMI(cell,tm,0) = source;
    dS[eqn] = -C_R(cell,thread)/CURRENT_TIMESTEP;
    return source;
 }
 
 DEFINE_SOURCE(x_prim_recoil, cell, tp, dS, eqn)
 {
    real source;
    Thread *tm = THREAD_SUPER_THREAD(tp);
    Thread *ts;
    ts = THREAD_SUB_THREAD(tm,1);
    source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_U(cell,tp);  
   dS[eqn] =-C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP;
    return source;
 }
  
 DEFINE_SOURCE(x_sec_recoil, cell, ts, dS, eqn)
 {
    real source;
    Thread *tm = THREAD_SUPER_THREAD(ts);
    source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_U(cell,ts);
    dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP;
    return source;
 }
 
 DEFINE_SOURCE(y_prim_recoil, cell, tp, dS, eqn)
 {
    real source;
    Thread *tm = THREAD_SUPER_THREAD(tp);
    Thread *ts;
    ts = THREAD_SUB_THREAD(tm,1);
    source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_V(cell,tp);
    dS[eqn] =-C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP;
    return source;
 }
 
  DEFINE_SOURCE(y_sec_recoil, cell, ts, dS, eqn)
 {
    real source;  Thread *tm = THREAD_SUPER_THREAD(ts);
    source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_V(cell,ts);
   dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP;
    return source;
 }
 
 DEFINE_SOURCE(z_prim_recoil, cell, tp, dS, eqn)
 {
    real source;
    Thread *tm = THREAD_SUPER_THREAD(tp);
    Thread *ts;
    ts = THREAD_SUB_THREAD(tm,1);
    source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_W(cell,tp);
    dS[eqn] =-C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP;
    return source;
 }
 
  DEFINE_SOURCE(z_sec_recoil, cell, ts, dS, eqn)
 {
    real source;
    Thread *tm = THREAD_SUPER_THREAD(ts);
    source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_W(cell,ts);
   dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP;
    return source;
 }

I want just to try if that will work but there is again error:

Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=33).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=180).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=256).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=336).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=412).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=506).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=582).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=662).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=738).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=832).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=908).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=988).
Error: D:\\Fluent\\Testy\\test3.c: line 80: label "store_vof_norm" not found (pc=1064).

Is there any special action to perform before interpreting such UDF or there is some kind of different error. I will be grateful for any tip.

[`e`]

Some macros require compiling the UDF instead of interpreting, try compiling your UDF. The examples provided in the UDF manual should work.

[vekh]

Thanks for reply. I'll try to do this tomorrow.

Update:
It works! Thank you man!

[Ronnie-Du]

But how do you solve it. I also encountered such a problem.

[pakk]

The first post shows the problem.
The second post shows the solution.
The third post confirms that the solution works.
The fourth post is you, asking what is the solution.
The fifth post is the one you are reading now.

[Meisam1300]

Hello all,
I encountered the error " store_vof_norm" not found when interpreting my file in fluent 16.2
I also compiled the udf code successfully but I am still getting the same error when interpreting.
can anyone help me to fix it ?
Thank you in advance.

[pakk]

The solution is to compile... which you have already done succesfully.

So, use the compiled version, and don't try the interpreted one.

[Meisam1300]

Thank you Pakk.
The problem is that when I compile and load it successfully and I want to call the udf file for boundary conditions I receive the error "no udf function is loaded".
Can you help me fix it. ?
Thank you again

[pakk]

Does you code include a boundary condition? The code above only has source conditions...

Otherwise: are you sure that compiling went fine? Did you check the screen if any errors showed up?

[Lee 小亢]

hello~
I want to use the degassing boundary for my case, but I don't know how to load this UDF to the layer of cells next to the outlet as Fluent UDF manual told,
can you help me?
Thx a lot~