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

Prescribed pressure at the boundary

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

LinkBack Thread Tools Display Modes
Old   June 29, 1999, 20:01
Default Prescribed pressure at the boundary
Dmitriy Makarov
Posts: n/a
Hi all,

The boundary condition with constant velocity for SIMPLE-family algorithms is well described and coarse no problem. But how to construct finite-difference scheme for pressure-velocity coupling at the inflow boundary (and outflow too) with P=Const? Can anybody point out literature source (book, journal etc.) on this term? Any commence are welcome also.

Thank you in advance,

  Reply With Quote

Old   June 30, 1999, 08:14
Default Re: Prescribed pressure at the boundary
Neyval C. Reis
Posts: n/a

Basically, you should set your pressure level at the first control volume inside the domain ( not the boundary point, usually the boundary point is not used to determine the pressure term in the momentum eq.), prescribe the pressure correction equal to zero, and ensure the mass conservation of this control volume using the continutity eq..Take a look at: Versteeg, HK, Malalasekera, W, An introduction to computational fluid dynamics - the finite volume method, Longman Scientific & Technical, Uk, 1995. I think this book contains a good description of the procedure.


  Reply With Quote

Old   July 1, 1999, 08:25
Default Re: Prescribed pressure at the boundary
Gassan Abdoulaev
Posts: n/a
Privet! Take a look at J.G.Heywood, R.Rannacher, S.Turek "Artificial boundaries and flux and pressure conditions for the incompressible N.S. equations" Int.J.Numer.Meth.Fluids, V.22 325-352 (1996).

And bythe way, I do pressure b.c., but for the finite elements, and basically have no problems.

  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
Pressure boundary condition C-H Kuo Main CFD Forum 18 September 16, 2016 03:19
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
stagnation pressure boundary problem mbgnfrx2 STAR-CD 2 November 26, 2012 00:55
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

All times are GMT -4. The time now is 02:19.