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

Define mass fraction for -ve velocity inlet/outlet

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 14, 2004, 05:37
Default Define mass fraction for -ve velocity inlet/outlet
  #1
KKLAU
Guest
 
Posts: n/a
To all fluent expert all over the world:

I got a simple question here. How to define mass fraction for negative velocity inlet (velocity outlet)?? Is it possible to do it by using FLUENT 6. I tried it with FLUENT 5 but when i changed the velocity direction to negative, the defined mass fraction was ignored. Can somebody suggest me a solution for this problem???

Thank you.

From

KKLAU

  Reply With Quote

Old   June 14, 2004, 15:23
Default Re: Define mass fraction for -ve velocity inlet/ou
  #2
George
Guest
 
Posts: n/a
Well, composition is naturally propagated from inside of the computational domain to the outlet boundary - that's why you cannot specify outlet composition beforehand. It will be used only with backflow (intake of fresh fluid from the inlet). What are you trying to model by this BC - a membrane??

George
  Reply With Quote

Reply


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
Defining species mass fraction using a UDF T81 Fluent UDF and Scheme Programming 3 April 19, 2018 08:02
mass flow in is not equal to mass flow out saii CFX 12 March 19, 2018 06:21
reversed flow at velocity inlet / mass flow inlet ib FLUENT 1 March 26, 2007 14:11
Free surface boudary conditions with SOLA-VOF Fan Main CFD Forum 10 September 9, 2006 13:24
UDF FOR UNSTEADY TIME STEP mayur FLUENT 3 August 9, 2006 11:19


All times are GMT -4. The time now is 16:41.