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

d2T/dx2 = 0 instead of dT/dx = 0 (outflow)

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 24, 2012, 12:05
Default d2T/dx2 = 0 instead of dT/dx = 0 (outflow)
  #1
New Member
 
Chahinez
Join Date: Apr 2011
Posts: 4
Rep Power: 6
chany is on a distinguished road
Hi everybody,

I have a big problem with boundary conditions of Fluent. I want to impose in the outlet of my conduct d2T/dx2 = 0 and there is no boudary condition doing that. For big Reynolds Number, I can put "outflow" (so dT/dx = 0) as a condition in outlet 'cause it has no big influence. But my problem deals with very small Reynolds numbers and so, outflow causes big trouble in my work and solution is false.

Can anybody help me?

Ps: I have a fluid in my duct so don't confuse with UDF that are reserved to walls or solids in general.
chany is offline   Reply With Quote

Reply

Tags
dt/dx, heat flux, outflow, udf, uds

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
Outflow boundary Control Volume SIMPLE Help !!! Mizerable Main CFD Forum 4 August 22, 2011 13:00
No outflow - Error sErik OpenFOAM Running, Solving & CFD 1 November 18, 2009 12:10
mass flux correction at outflow boundaries Subhra Datta Main CFD Forum 2 November 24, 2003 14:11
outflow boudary condition in SIMPLE algorithm dallybird Main CFD Forum 0 March 6, 2003 12:55
Outflow Bocos Romuald Skoda Main CFD Forum 3 August 6, 1999 03:08


All times are GMT -4. The time now is 00:59.