# Pressure BC in SIMPLE

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 May 2, 2005, 20:51 Pressure BC in SIMPLE #1 Ankan Guest   Posts: n/a Sponsored Links Hi I am trying to discretize SIMPLE on a staggered grid. It is okay to handle a constant velocity BC since the velocity values at wall are known and that just leads to a zero veloctiy correction at the entrance boundary points. I was wondering what to do with the constant pressure BC. The pressure correction at wall is zero, but we cant place them explicitly in the equation since we are not solving for pressure at wall but only at interior points. Thanks in advance for your responses. Ankan

 May 3, 2005, 06:16 Re: Pressure BC in SIMPLE #2 dpshaka Guest   Posts: n/a the boundary condition for the presssure correction equation is the insulation boundary condition . but when you only know the value of the pressur at the boundary ,the value of velocity is unknow.you should use a speciall procedure to convert the pressure to the velocity .you can find it on the <> thank you

 May 3, 2005, 14:10 Re: Pressure BC in SIMPLE #3 Ankan Guest   Posts: n/a Hi Thanks for your response. Looks like you put in some link for further clarification but it does not seem to be working. I will appreciate if you could post the reference once again. Ankan

 May 3, 2005, 19:33 Re: Pressure BC in SIMPLE #4 Halim Guest   Posts: n/a The pressure correction at the pressure boundary is zero, then you should update the boundary velocity components (or mass flux) using the pressure correction at the boundary and that near the boundary explicitly at each iteration to satisfy the continuity equation. The velocity correction equations for the boundary velocities can be derived as the same way as those in the interior region.

 May 3, 2005, 23:40 Re: Pressure BC in SIMPLE #5 dpshaka Guest   Posts: n/a [21] Kanchan and M. Kelkar , Numerical Method for the prediction of incompressible flow and Heat Transfer In Domain With Specified Pressure Boundary Conditions, Numerical Heat Transfer. Part B, vol. 38, pp. 15-36, 2000.

 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 Maarten de Jong Main CFD Forum 7 April 30, 2012 02:23 atareen64 OpenFOAM 2 February 2, 2011 05:39 yhoarau Main CFD Forum 1 April 16, 2009 09:16 milos OpenFOAM Pre-Processing 1 March 21, 2009 08:08 Diego Nogueira Main CFD Forum 6 October 10, 2004 14:43