CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Help::Air Properties

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

LinkBack Thread Tools Display Modes
Old   June 4, 2007, 23:54
Default Help::Air Properties
Posts: n/a
Hello every one. can any one please tell me, how to modify the properties of the air so that it idealizes to vaccum, Wat should be the density, thermal conductivity and other parameters, I need to modify the properties of air because I am solving a radiation problem and need to have vaccum in some zone.

thanks ashish

  Reply With Quote

Old   June 5, 2007, 04:57
Default Re: Help::Air Properties
Prasad Dudhgaonkar
Posts: n/a
Although I may not be able to help you set radiation problem I would just like mention a couple of things which may help you think towards the solution you are desiring. Vacuum is measured as the absolute pressure below atmospheric pressure. This absolute pressure (below atm) when input as operating condition will denote desired vacuum. Air properties can anyway be changed as desired in materials panel. If vacuum is desired only in one of the zones, the desired value of absolute pressure can be patched in that zone alone.
  Reply With Quote

Old   June 6, 2007, 14:24
Default Re: Help::Air Properties
Ralf Schmidt
Posts: n/a

Prasad is right, additionally I wolud suggest, to use as air material properties for density the "ideal gas". Otherwise, changing operating pressure will have no effet!

  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
Chemical properties that are used in Fluent kimej FLUENT 4 August 19, 2011 11:29
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
Properties of air versus temperature AND pressure Vincent Main CFD Forum 5 July 28, 2008 06:28
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02

All times are GMT -4. The time now is 00:58.