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

Density based solver

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

Like Tree1Likes
  • 1 Post By Mubassh

LinkBack Thread Tools Search this Thread Display Modes
Old   May 24, 2007, 06:36
Default Density based solver
Posts: n/a
Dear all, Please give me the major differences between "Density based solver and Pressure based solver"

Thank you Eswar
  Reply With Quote

Old   May 28, 2007, 22:24
Default Re: Density based solver
Posts: n/a
Mass conservation is used to calculate density(DBNS) instead of pressure(PBNS).

Pressure Based Solver:

Pressure Information always moves with the velocity of sound. For incompressible flows(u<<c), pressure is a very sensitive variable and care should be taken to solve pressure equation. We are neglecting the variation density, and temperature variation due to density variation. So the equations are decoupled and we can solve it independently.

Density Based Solver:

If the flow is compressible, now the velocity informations moves with the reasonable speed comparing with pressure informations(u>0.3*c.. u>>c), and also density variation, T variation due to density, and pressure variation. So all the equations are coupled, velocity equations have more sensitive than pressure equation. Since the flow is compressible, we can derive pressure from the equation of state.

Regards, Mubassh
imnull likes this.
  Reply With Quote

Old   May 29, 2007, 07:29
Default Re: Density based solver
Posts: n/a
Thank you very much for clarifying my doubt Mr.Mubassh. Eswar...
  Reply With Quote


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
Pressure gradient in UDF for density based solver matzb FLUENT 0 February 22, 2010 06:34
regarding density and pressure based solver Reddy FLUENT 0 August 18, 2007 11:11
Regarding Density based solver Eswar Main CFD Forum 2 June 6, 2007 11:00
Pressure based and Density based Solver Xobile Siemens 1 November 30, 2004 21:13
compressible two phase flow in CFX4.4 youngan CFX 0 July 1, 2003 23:32

All times are GMT -4. The time now is 23:12.