CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Mass conservation law violation in stationary case

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 27, 2007, 04:07
Default Mass conservation law violation in stationary case
  #1
vitmalin
Guest
 
Posts: n/a
Dear colleagues,

I have got very surprising result trying to simulate air ideal gas heating process in closed volume (stationary case). The matter is that instead of expected pressure rise due to ideal gas heating Fluent decreases ideal gas density! From my point of view in accordance with mass conservation law in closed system the air ideal gas density = mass/volume is constant!

Problem setup: closed volume with wall at 450K. Initial conditions: 300K and relative pressure = 0 Pa. Reference pressure = 1e5 Pa. Simulation type: Stationary.

P.S. The same model in transient case provides physically adequate result: final pressure = 1.5e5 Pa.

Could anyone advise me something to fix this problem?

Best Regards, Vitmalin
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mass conservation in COMSOL Diego COMSOL 1 December 27, 2010 06:14
mass conservation in VOF method meith Main CFD Forum 2 August 12, 2010 12:30
Mass conservation law violation in stationary case vitmalin CFX 3 September 3, 2007 14:32
Free surface boudary conditions with SOLA-VOF Fan Main CFD Forum 10 September 9, 2006 13:24
Question on Sediment Mass Conservation Scheme Wen Long Main CFD Forum 0 July 6, 2004 16:45


All times are GMT -4. The time now is 02:33.