[hitzhwan]

I have two single udf files（see attachments）， how can I put them together in one .c file， who can help me？

[pakk]

You can do it in notepad. Open one, select all, copy. Then open the other one, paste.

[hitzhwan]

Originally Posted by pakk

You can do it in notepad. Open one, select all, copy. Then open the other one, paste.

Thank you for your reply,I tried it, but the heat.c does not work, could you tell me the reason? Whether should revise it a little such as delete one head "#include "udf.h"". I have also tried this, it still does not work.

[mohammadreza_hj]

Originally Posted by hitzhwan

I have two single udf files（see attachments）， how can I put them together in one .c file， who can help me？

i think that you should put your solver on transient and try again... or in heat udf, define a variable like Q and put that into the loop instead of the profile.
i hope that work.

[hitzhwan]

Originally Posted by mohammadreza_hj

i think that you should put your solver on transient and try again... or in heat udf, define a variable like Q and put that into the loop instead of the profile.
i hope that work.

Hi, thank you for your reply. I am using a transient model, and I just try the udf.c solely, it can work, which shows the profile does not have any problem. But when I put two udfs together, the heat.c does not work. This shows that may be the problem locates at the putting together directed.

[pakk]

Originally Posted by hitzhwan

Thank you for your reply,I tried it, but the heat.c does not work, could you tell me the reason? Whether should revise it a little such as delete one head "#include "udf.h"". I have also tried this, it still does not work.

You really need to be more specific. What does "heat.c does not work" mean? Does it give warnings? Errors? Crash the program? Give wrong results? I can not see what you see on you screen, so please don't let me guess what happens.

[hitzhwan]

Originally Posted by pakk

You really need to be more specific. What does "heat.c does not work" mean? Does it give warnings? Errors? Crash the program? Give wrong results? I can not see what you see on you screen, so please don't let me guess what happens.

Hi， it means the function in the heat.c does not work in the fluent, it cannot realize the function(by monitoring the heat flux in the wall, the wall heat flux is still 0 at time larger than 0.3s,which is not correct), and there is no error in fluent. Does that make sense?

[AlexanderZ]

put your code into 1 file and compile

#include "udf.h"

DEFINE_PROFILE(inlet_x_velocity, thread, index)
{
real x[ND_ND]; /* this will hold the position vector */
real y;
face_t f;
begin_f_loop(f, thread)/* loops over all faces in the thread passed
in the DEFINE macro argument*/
{
F_CENTROID(x,f,thread);
y = x[1];
F_PROFILE(f, thread, index) = 20. - y*y/(.0745*.0745)*20.;
}
end_f_loop(f, thread)
}

DEFINE_PROFILE(hf_change,thread,position) 
{
  face_t f;
  real time,heat_flux1,heat_flux2;
  heat_flux1 = 0;
  heat_flux2 = 47300;
  time= RP_Get_Real("flow-time");
  begin_f_loop(f,thread)
  {
   
	if (time<0.3)
	{
	F_PROFILE(f,thread,position)=heat_flux1;
	}
        
	else if (time>=0.3)
	{
	F_PROFILE(f,thread,position)=heat_flux2;
	}
      	
   }
  end_f_loop(f,thread)
}

hook functions properly, which means apply to boundaries respectively

[pakk]

Originally Posted by hitzhwan

Hi， it means the function in the heat.c does not work in the fluent, it cannot realize the function(by monitoring the heat flux in the wall, the wall heat flux is still 0 at time larger than 0.3s,which is not correct), and there is no error in fluent. Does that make sense?

Did it work when it was in a separate file?

By the way:if you compile, there is no need to put in on one file. That is only needed if you interpret, and you should not do that unless strictly necessary.

[hitzhwan]

Originally Posted by pakk

Did it work when it was in a separate file?

By the way:if you compile, there is no need to put in on one file. That is only needed if you interpret, and you should not do that unless strictly necessary.

Hi，it works in separate file， why can not do that way？

[hitzhwan]

Originally Posted by AlexanderZ

put your code into 1 file and compile

#include "udf.h"

DEFINE_PROFILE(inlet_x_velocity, thread, index)
{
real x[ND_ND]; /* this will hold the position vector */
real y;
face_t f;
begin_f_loop(f, thread)/* loops over all faces in the thread passed
in the DEFINE macro argument*/
{
F_CENTROID(x,f,thread);
y = x[1];
F_PROFILE(f, thread, index) = 20. - y*y/(.0745*.0745)*20.;
}
end_f_loop(f, thread)
}

DEFINE_PROFILE(hf_change,thread,position) 
{
  face_t f;
  real time,heat_flux1,heat_flux2;
  heat_flux1 = 0;
  heat_flux2 = 47300;
  time= RP_Get_Real("flow-time");
  begin_f_loop(f,thread)
  {
   
	if (time<0.3)
	{
	F_PROFILE(f,thread,position)=heat_flux1;
	}
        
	else if (time>=0.3)
	{
	F_PROFILE(f,thread,position)=heat_flux2;
	}
      	
   }
  end_f_loop(f,thread)
}

hook functions properly, which means apply to boundaries respectively

I compiled as you said，but it still does not work.
The below are the process notes:

nformation: The surface name point-150 no longer exists for report definition tem-150. They must have been deactivated/deleted.
Information: The surface name line-150 no longer exists for report definition phase-line-150. They must have been deactivated/deleted.
Information: The surface name line-30 no longer exists for report definition phase-line-30. They must have been deactivated/deleted.
************************************************** **************************
************************************************** **************************
** WARNING: Automatically switched to run in parallel -t1 mode. **
** Detected non-parallelized UDF usage, enabling parallel usage. **
** If you encounter any issues, please re-run with -t0 flag. **
************************************************** **************************
************************************************** **************************
cpp -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/main" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/addon-wrapper" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/io" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/species" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/pbns" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/numerics" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/sphysics" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/storage" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/mphase" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/bc" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/models" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/material" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/amg" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/util" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/mesh" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/udf" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/ht" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/dx" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/turbulence" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/acoustics" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/parallel" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/etc" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/ue" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/dpm" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/dbns" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/tgrid/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/PRIME/tgrid/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/cortex/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/client/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/multiport/src" -I. -DUSE_UDF_HOST_DUMMY -DUDFCONFIG_H="<udfconfig-host.h>" "C:/Users/zhwan/Desktop/compiled.c"

cpp -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/main" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/addon-wrapper" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/io" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/species" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/pbns" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/numerics" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/sphysics" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/storage" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/mphase" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/bc" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/models" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/material" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/amg" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/util" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/mesh" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/udf" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/ht" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/dx" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/turbulence" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/acoustics" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/parallel" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/etc" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/ue" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/dpm" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/src/dbns" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/tgrid/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/PRIME/tgrid/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/cortex/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/client/src" -I"C:\PROGRA~1\ANSYSI~1\v193\fluent\fluent19.3.0/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/zhwan/AppData/Local/Temp/udfconfig-12632-node0.h>" "C:/Users/zhwan/AppData/Local/Temp/compiled.c.12632.0.c"

[AlexanderZ]

you may try to change time= RP_Get_Real("flow-time");
to time= CURRENT_TIME;

[hitzhwan]

Originally Posted by AlexanderZ

you may try to change time= RP_Get_Real("flow-time");
to time= CURRENT_TIME;

There is no difference for it.

[pakk]

Originally Posted by hitzhwan

Hi，it works in separate file， why can not do that way？

You are very confusing in your communication. If it works in a separate file, you can do it that way. Why do you ask me why you can NOT do it in that way?

I should ask you that question! If it works in separate files, why do go through all these troubles to combine it into one file?

[hitzhwan]

Originally Posted by pakk

You are very confusing in your communication. If it works in a separate file, you can do it that way. Why do you ask me why you can NOT do it in that way?

I should ask you that question! If it works in separate files, why do go through all these troubles to combine it into one file?

Yes， I have combined it into one file，but one of it （heat.c） does not work, I do not know what is the reason? Can you do it in your computer?

[pakk]

Originally Posted by hitzhwan

Yes， I have combined it into one file，but one of it （heat.c） does not work, I do not know what is the reason? Can you do it in your computer?

If you have combined it into one file, you only have one file. It makes no sense to say "one if it does not work", if you have only one.

You still did not answer the question. Let me ask it again. I will make it big and bold so you can not miss it:

WHY do you want to combine it into one file?

If everything works with separate files, just use separate files. Don't torture yourself.

[pakk]

Oh wait, I know the reason.

You said before that you compiled, but in reality you are interpreting. You go in the menu to "Define -> user-defined -> functions -> Interpreted", right?

Well... Try to compile for a change. Go to "Define -> user-defined -> functions -> Compiled".

[hitzhwan]

Originally Posted by pakk

Oh wait, I know the reason.

You said before that you compiled, but in reality you are interpreting. You go in the menu to "Define -> user-defined -> functions -> Interpreted", right?

Well... Try to compile for a change. Go to "Define -> user-defined -> functions -> Compiled".

Yes，you are right. I can interpret them one by one.

But when I try to compiled them one by one , the heat.c does not work, could you help me deal with it .

[pakk]

Let me get this straight, because the story keeps changing.

1. You were able to interpret both files separately. (I mean: no errors or crashes.)
2. When you interpreted heat.c, it gave the result you wanted: the wall heated up after t=0.3.
3. You were able to compile both files separately (I mean: no errors or crashes.)
4. When you used the compiled version for heat.c, you did suddenly NOT get the result you wanted: the wall did not heat up after t=0.3.

Is this accurate?

(I told you before: "does not work" is too vague. Be more specific: does it crash Fluent? does it give errors? Does it give warnings? Does it give unexpected results? Does it make your computer burn? Each of these events has a different solution.)

[hitzhwan]

Originally Posted by pakk

Let me get this straight, because the story keeps changing.

1. You were able to interpret both files separately. (I mean: no errors or crashes.)
2. When you interpreted heat.c, it gave the result you wanted: the wall heated up after t=0.3.
3. You were able to compile both files separately (I mean: no errors or crashes.)
4. When you used the compiled version for heat.c, you did suddenly NOT get the result you wanted: the wall did not heat up after t=0.3.

Is this accurate?

(I told you before: "does not work" is too vague. Be more specific: does it crash Fluent? does it give errors? Does it give warnings? Does it give unexpected results? Does it make your computer burn? Each of these events has a different solution.)

Yes, all your four points are accurate, there is no errors or crashes when I interpreted or compiled them separately or together. You can run them in your fluent softeware, you can see whether it happens on your software.