CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

UDF for turbomachinery

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 24, 2003, 20:00
Default UDF for turbomachinery
  #1
Tom
Guest
 
Posts: n/a
Hello,

I'm looking for a sample of UDF or want to know the variables to make UDF for Turbomachinery.

What I want to do is to change RPM of fluid by time dependent.

FLUENT do not have choice to change RPM time dependent or using UDF for sliding mesh.

Please help me!

Regards,
  Reply With Quote

Old   January 24, 2003, 21:54
Default Re: UDF for turbomachinery
  #2
phd_y2k2001@yahoo.com
Guest
 
Posts: n/a
U can do by a script. What do you want with UDF? Check the UDF manual. Yes you can change the rpm by a script for a time dependent prob.
  Reply With Quote

Old   January 25, 2003, 12:21
Default Re: UDF for turbomachinery
  #3
Tom
Guest
 
Posts: n/a
U mean using profile file as script, right? I just want to make UDF for rotational machine from 0 RPM to accerelated certain RPM.
  Reply With Quote

Old   January 26, 2003, 00:42
Default Re: UDF for turbomachinery
  #4
phd_y2k2001@yahoo.com
Guest
 
Posts: n/a
U se moving wall BC. In the script you can use one RPM for certail time and then you can use a different RPM and you can do this as long as want and as many RPM you wants.

Do you mean you want to use a time variation of the rotating wall? I mean rpm = f ( time)? Yes for this u need UDF.

Otherwise use a simple script and submit the job as a batch.

For example: file rcd tom q def bc wall ... ... ... [make here ur desired rpm]

q q .. [then solve for certain time steps.. .. then q q def bc wall. ..[change ur rpm as u want..]

... ...

Regards, phd_y2k2001@yahoo.com
  Reply With Quote

Reply

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
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
Dynamic Mesh UDF Qureshi FLUENT 1 December 2, 2009 01:27
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 12:11.