CFD Online Logo CFD Online URL
Home > Forums > Fluent UDF and Scheme Programming

Density UDF for supersonic flow

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

LinkBack Thread Tools Display Modes
Old   April 18, 2013, 05:48
Cool Density UDF for supersonic flow
New Member
Dave Christopher
Join Date: Dec 2009
Posts: 26
Rep Power: 10
David Christopher is on a distinguished road
I want to model non-ideal gas supersonic gas flow. I have written UDF routines for the density and the sound speed. They calculate for a short while, but then diverge and crash (even using the ideal gas equations in the UDF). If I use Ideal Gas density (not UDF routines), the calculation is fine. With the UDF for the density, Fluent no longer seems to know that it is supersonic. Any suggestions on how to get the case to run?
David Christopher is offline   Reply With Quote


density udf, divergence, supersonic flow

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
Ansys Fluent UDF - for Data Center Air flow management kedarjan Fluent UDF and Scheme Programming 13 November 13, 2013 05:20
UDF for solid density gghazal Fluent UDF and Scheme Programming 3 November 13, 2012 04:10
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
REAL GAS UDF brian FLUENT 6 September 11, 2006 08:23
Warning 097- AB Siemens 6 November 15, 2004 05:41

All times are GMT -4. The time now is 05:33.