CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent UDF and Scheme Programming

Setting Inlet as Wall until flow occurs via UDF

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 1, 2012, 13:05
Default Setting Inlet as Wall until flow occurs via UDF
  #1
New Member
 
Emma
Join Date: Sep 2009
Posts: 17
Blog Entries: 1
Rep Power: 16
emmkell is on a distinguished road
I have a time dependent model, with a UDF to apply a temperature gradient to one of the walls up to a certain time.

After 60 seconds, another UDF then tells the velocity inlet there is flow for 2 seconds, so a sort of on/off message for the velocity inlet.

Is there a way of telling the velocity inlet to act as a wall until such time as the flow occurs? The temperature of the inlet is not changing when the temperature gradient is applied to the heated wall. I assume this is because in the thermal heading of the velocity inlet boundary condition, the temperature must be set. I want it to change with the rest of the material until such time as flow occurs.

Is there a way of doing this? Something to do with Execute on demand? I've attached a picture which might explain it better.

Any help would be really appreciated!
Attached Images
File Type: jpg image1.jpg (55.0 KB, 9 views)
emmkell is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
UDF for transient pressure inlet, mass flow check at nozzle exit and volumetric heat kokoory FLUENT 0 August 17, 2011 03:07
reversed flow at velocity inlet / mass flow inlet ib FLUENT 1 March 26, 2007 14:11
where to setting the slip wall in udf cxzhao FLUENT 4 July 4, 2005 03:56
Warning 097- AB Siemens 6 November 15, 2004 05:41
Multicomponent fluid Andrea CFX 2 October 11, 2004 06:12


All times are GMT -4. The time now is 06:01.