CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

UDF - PLease help!!

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   November 16, 2005, 20:31
Default UDF - PLease help!!
Vidya Raja
Posts: n/a

I'm trying to use UDF to simulate unsteady velocity in Fluent. My equation is as follows:

Q = 0.35 + 0.35 * sin(2*pi*0.5*t)

I wrote the following code in C in order to hook it to Fluent:

#include "udf.h"

DEFINE_PROFILE(unsteady_velocity, thread, position) { face_t f; real t = CURRENT_TIME;

begin_f_loop(f, thread)


F_PROFILE(f, thread, position) = 0.35 + 0.35*sin(2*pi*0.5*t);

} end_f_loop(f, thread) }

But Fluent refuse to read it and gives an error called PARSE ERROR - LIne 1. Also it crashes whenever I try to make it read the UDF. I have no clue why this is happening.

Could anyone explain this and tell me how it can be corrected?

Any help is greatly appreciated.

Thanks, Vidya
  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dynamic Mesh UDF Qureshi FLUENT 7 March 23, 2017 08:37
UDF parallel error: chip-exec: function not found????? shankara.2 Fluent UDF and Scheme Programming 1 January 16, 2012 23:14
How to add a UDF to a compiled UDF library kim FLUENT 3 October 26, 2011 21:38
UDF...UDF...UDF...UDF Luc SEMINEL FLUENT 0 November 25, 2002 05:03
UDF, UDF, UDF, UDF Luc SEMINEL Main CFD Forum 0 November 25, 2002 05:01

All times are GMT -4. The time now is 15:41.