CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Setting Density for Velocity Inlet Face

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 7, 2012, 15:15
Post Setting Density for Velocity Inlet Face
Join Date: Nov 2012
Posts: 68
Rep Power: 10
arkie87 is on a distinguished road
My problem involves a velocity inlet which is supposed to supply a desired mass flow rate.

However, my problem also includes one UDS, which is used to get the density field through a UDF. Fluent seems to be taking the density of the cells adjacent to the velocity inlet to evaluate density on the inlet face instead of using the value of the UDS specified.

I tried defining my own flux UDF for the UDS; however, i cannot adjust the way fluent calculates flux for the continuity and momentum equations, so this solution is not sufficient.

In addition, switching to a mass flow rate inlet condition will not solve the problem since the incorrect density will result in the incorrect velocity.

Accordingly, the best solution seems to be to set the correct density on the inlet face (that way all calculations done internally by fluent with this density are correct).

However, i am hesitant to simply define a user adjust or execute on end because i am worried fluent will overwrite my correction internally.

How do i specify density on inlet face/how do i change the way fluent calculates density on the inlet face?

arkie87 is offline   Reply With Quote


density, face, velocity inlet

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
[Netgen] Import netgen mesh to OpenFOAM hsieh OpenFOAM Meshing & Mesh Conversion 32 September 13, 2011 05:50
[Gmsh] Import problem ARC OpenFOAM Meshing & Mesh Conversion 0 February 27, 2010 10:56
Setting dynamic pressure as the inlet BC ruined FLUENT 1 March 26, 2008 05:30
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 05:13

All times are GMT -4. The time now is 15:44.