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Search took 0.00 seconds. Search: Posts Made By: PKM
Forum: Fluent UDF and Scheme Programming May 23, 2012, 16:02
Replies: 17
Views: 6,543
Posted By PKM
I changed 1s 2400 steps 20 iterations and one...

I changed 1s 2400 steps 20 iterations and one other way but the solution doesenīt reach convergence. I checked the out flow pattern and that is jumping as well. There is some problem with the flow...
Forum: Fluent UDF and Scheme Programming May 22, 2012, 12:41
Replies: 17
Views: 6,543
Posted By PKM
I made some changes in the mesh and in the...

I made some changes in the mesh and in the velocity K-epsilon model and run the calculation again with 100 iterations per time step. At first everything was running smoothly but as the temp rose near...
Forum: Fluent UDF and Scheme Programming May 22, 2012, 04:41
Replies: 17
Views: 6,543
Posted By PKM
I used Time step size: 20 steps: 120 and...

I used Time step size: 20 steps: 120 and iterations 20. I canīt use pressure outlet because I donīt know the temp there. How can I know when the solution is converged?
Forum: Fluent UDF and Scheme Programming May 11, 2012, 06:13
Replies: 17
Views: 6,543
Posted By PKM
Tested it out and the temperature distripution...

Tested it out and the temperature distripution looks nice through out the flow time and itīs the heattransfer results come back as I expected. But there are still some problems.
...
Forum: Fluent UDF and Scheme Programming May 10, 2012, 15:29
Replies: 17
Views: 6,543
Posted By PKM
=> Daniel Tanner the temperature change is put on...

=> Daniel Tanner the temperature change is put on to inlet boundary witch is were I need it. The temp at the wall doesnīt look that grate in the end.

=> Iīm gonna try the other if statement...
Forum: Fluent UDF and Scheme Programming May 10, 2012, 09:17
Replies: 17
Views: 6,543
Posted By PKM
Thank you for your ideas. I wrote it like this...

Thank you for your ideas.
I wrote it like this (I simplified it and changed times and temps a bit...):
#include "udf.h"


DEFINE_PROFILE(temperature_profile,thread,position )
{ face_t f;

...
Forum: Fluent UDF and Scheme Programming May 9, 2012, 09:32
Replies: 17
Views: 6,543
Posted By PKM
Could anyone help me write UDF for time dependent temperature in BC

Hey all, I need some help on writing UDF for Inlet BC. The inlet temp changes in time from 300K to 800K and back to 300K.
Problem:
Step1. 100 s temp stays 300K
Step 2. 100s to 700s Temp grows...
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