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

Pressure BC in SIMPLER Algorithm?

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

LinkBack Thread Tools Display Modes
Old   August 24, 2006, 08:43
Default Pressure BC in SIMPLER Algorithm?
Posts: n/a
Hi Guys,

I am going to use SIMPLER algorithm in my code. In SIMPLER algorithm, velocity field is guessed and then Pressure equation is solved. I am wondering what would be boundary condition for pressure equation in a lid driven cavity flow. Should pressure consider as zero on all walls?

Thanks for your help.

  Reply With Quote

Old   August 24, 2006, 18:45
Default Re: Pressure BC in SIMPLER Algorithm?
Posts: n/a
If the velocitites are imposed at the boundary like the lid-driven cavity flow and if you uses the staggered grid layout, you do not need the pressure at the boundaries. When you derive the pressure equation just near the bounadry, set pseudo-velocities at the boundary by the real velocities and set the coefficient of the pressure equation (for example, AN for the north boundary) zero. After you calculate flow field, get the pressure at the boundary by extrapolation of inner point values. Read Patankar's book, you may understand what I am talking about.

  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
Boundary conditions using SIMPLER algorithm lost.identity Main CFD Forum 9 October 25, 2010 18:27
Does star cd takes reference pressure? monica CD-adapco 1 April 19, 2007 11:26
Gas pressure question Dan Moskal Main CFD Forum 0 October 24, 2002 22:02
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13
Definition of pressure Ola Nordblom FLUENT 1 August 16, 2001 15:58

All times are GMT -4. The time now is 18:55.