# Physical properties about "Air Ideal Gas" In CFX

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

 July 8, 2004, 21:42 Physical properties about "Air Ideal Gas" In CFX #1 Twiti Guest   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.

 July 9, 2004, 00:28 Re: Physical properties about "Air Ideal Gas" In C #2 deLuther Guest   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).

 July 10, 2004, 02:22 Re: Physical properties about "Air Ideal Gas" In C #3 Twiti Guest   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.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Val Main CFD Forum 3 June 10, 2011 02:20 Joseph CFX 14 April 20, 2010 15:45 Rui CFX 9 May 28, 2007 05:59 Craig Branch Main CFD Forum 2 September 28, 2004 03:35 Pandu Sattvika CFX 1 December 1, 2001 05:07

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