UDF 3D inlet b.c. problem
 

Hello,

I am trying to define a 3D parabolic inlet velocity profile using a UDF. My udf compiles (as an interpreted udf) without any errors. It then becomes an option to pick in the inlet boundary condition drop down list. However, when I try to initialize the flow, the program freezes. Has anyone experienced this problem, and if so, did you find a solution?

Thank you,

Andrew

Re: UDF 3D inlet b.c. problem
 

Hi

What "program freezes" means?

Zwdi

Re: UDF 3D inlet b.c. problem
 

What I mean when I say the "program freezes" is that the simulation cannot be started. In the 'initialization window' I select initialize flow from inlet condition and that is as far as I can get. It doesn't initialize the flow or report an error. It just simply locks up - doesn't do anything. I cannot select another option, it won't respond to anything. All I can do is kill the program in the unix shell.

Re: UDF 3D inlet b.c. problem
 

This is kind of a roundabout way of getting around the problem, but you could manually write a profile in a text editor and read that into FLUENT for you boundary condition.

Re: UDF 3D inlet b.c. problem
 

First of all, check if the problem happens even without the UDF. If not, try to post the code you're using.

If you do a search on this forum, you should find a UDF for a 3D parabolic velocity profile I posted in an answer to another question.

Hi :)

ap