Learning Forum

[jmsz7x]

I am creating a DEFINE_HEAT_FLUX udf in ANSYS fluent using MSVC. When I compile and load the udf I don't seem to get errors. This is the response from the console:

> Copy "C:\Users\jmsee\Documents\Rc.c" to "C:\Users\jmsee\Documents\libudf\src"
Creating user_nt.udf file for 3ddp_host ...

Copyright 1987-2024 ANSYS, Inc. All Rights Reserved.
Compiler and linker: Microsoft Visual C++
# Generating ud_io1.h
Rc.c
# Generating udf_names.c because of makefile Rc.obj
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj Rc.obj
Creating library libudf.lib and object libudf.exp
Creating user_nt.udf file for 3ddp_node ...

Copyright 1987-2024 ANSYS, Inc. All Rights Reserved.
Compiler and linker: Microsoft Visual C++
# Generating ud_io1.h
Rc.c
# Generating udf_names.c because of makefile Rc.obj
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj Rc.obj
Creating library libudf.lib and object libudf.exp

Done.

jaredcomputer: Opening library "C:\Users\jmsee\Documents\libudf"...
Done.

jaredcomputer: Opening library "C:\Users\jmsee\Documents\libudf"...
Rc
Done.

I can even hook the function to fluent, but when I go to wall boundary conditions there is no dropdown for the udf. Can someone tell me what the problem is?

[Rob]

You may want to read the section in the manual covering DEFINE_HEAT_FLUX I suspect it's not the function you're looking for, and isn't hooked into the wall bc. 

[jmsz7x]

I have already read that section of the manual.  Not sure why you have that impression, but if you don't apply it to boundary conditions then how do you use it?

[Rob]

It's a generic modification, and covered here  https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v242/en/flu_udf/flu_udf_ModelSpecificDEFINE.html%23flu_udf_sec_define_heat_flux 

[jmsz7x]

Rob, your link takes me to the ansys customer support page.  I am a student and so I cannot access their support

[Rob]

Launch Help from Fluent and then paste the link into the browser. There is a public version now too, but the trick bypasses the password lock. 

[jmsz7x]

Which help from fluent? Like the button that shows when accessing a dialog box?

[Rob]

Yes, that launches into a browser and paste the link into that browser. 

[jmsz7x]

Ok, but that only takes me to the part of the manual that I already read, as I said before.  Also, it is rather ambiguous about how it is used, it only explains how to hook it.

[Rob]

But it does point out that DEFINE_PROFILE is also available.