CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Ideal gas v.s. Real gas for wing simulation

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

LinkBack Thread Tools Display Modes
Old   December 16, 2013, 06:09
Question Ideal gas v.s. Real gas for wing simulation
Senior Member
Anna Tian's Avatar
Meimei Wang
Join Date: Jul 2012
Posts: 494
Rep Power: 9
Anna Tian is on a distinguished road

Ideal gas properties are different from the real gas properties. I noticed that when people simulation airfoil (like the Fluent tutorial), they always choose ideal gas rather than real gas. May I ask why? That won't introduce large error? Why don't they use the real gas?
Best regards,
Anna Tian is offline   Reply With Quote

Old   December 16, 2013, 12:39
Senior Member
Join Date: Jul 2009
Posts: 247
Rep Power: 12
agd is on a distinguished road
The ideal gas model is a very accurate model over a fairly large range of temperatures and for pressures that are not too high. The definition of "too high" is somewhat fuzzy, but most good thermodynamics books will provide background on when the ideal gas equation of state is not sufficient and should be replaced by a better model, say the van der Waals EOS. One other thing to keep in mind s the difference between an ideal gas model (specific heats are functions of temperature), and the perfect gas model (where the specific heats are constant.)
agd is offline   Reply With Quote


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
Parallel User Defined Real Gas Model aeroman FLUENT 4 July 1, 2015 06:09
view factor yoollooz Fluent UDF and Scheme Programming 0 March 1, 2013 01:44
UDF for Turbulent Viscosity Lourival Fluent UDF and Scheme Programming 3 October 13, 2012 03:09
UDF error - FLUENT received fatal signal (ACCESS_VIOLATION) Eliasjal Fluent UDF and Scheme Programming 1 March 7, 2012 12:11
Real Gas Mixture With Reactions Jake Cannon Main CFD Forum 0 January 16, 2007 12:46

All times are GMT -4. The time now is 04:16.