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

Physical properties about "Air Ideal Gas" In CFX

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

LinkBack Thread Tools Display Modes
Old   July 8, 2004, 21:42
Default Physical properties about "Air Ideal Gas" In CFX
Posts: n/a
I am doing numerical simulation about the mixing of two fluids with different temperature by CFX-5. Both of the fluids were set to "Air Ideal Gas" with the higher temperature of 300k and the lower temperature of 150 (pressure 1 atm). But I got the averaged density at the high temperature(300K) inlet the value of 2.34kg/m^3, which should be 1.2kg/m^3 dut to the temperature and pressure. Can anybody tell me the possible reason? I am a new user of CFX.
  Reply With Quote

Old   July 9, 2004, 00:28
Default Re: Physical properties about "Air Ideal Gas" In C
Posts: n/a
It seems to be like you have temperature close to 150K at inlet(density 2.3528228852054585 kg/m^3)... Check your physics. Or describe your model more precisely(or send it if it is small).
  Reply With Quote

Old   July 10, 2004, 02:22
Default Re: Physical properties about "Air Ideal Gas" In C
Posts: n/a
Thanks, deLuther

This is my first time to use CFX (used to Fluent before), so maybe I have made some very stupid mistakes. The density at the low temperature 150K inlet is 4.33 refer to the area-averaged calculation, which is almost twice the ordinary value(similar thing happened at the 300K inlet). I just set desity to be calculated based on the ideal gas law.

I'll check it more carefully.
  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
Pros and Cons for CFX, CFdesign, COMSOL Val Main CFD Forum 3 June 10, 2011 02:20
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
PhD using CFX Rui CFX 9 May 28, 2007 05:59
physical properties used in CFD codes Craig Branch Main CFD Forum 2 September 28, 2004 03:35
CFX 4.4 installation problem Pandu Sattvika CFX 1 December 1, 2001 05:07

All times are GMT -4. The time now is 09:40.