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

Using compressible BCs for incompressible problems

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

LinkBack Thread Tools Display Modes
Old   April 9, 2006, 01:07
Default Using compressible BCs for incompressible problems
Posts: n/a
Hello ppl,

I'm trying to formulate the flow past a block in an open domain. I've a fractional step scheme on hand and I'm using the finite volume method. I've used it to test Ghia's lid driven cavity and results are very similar.

I believe I just need to modify the boundary conditions (BCs) for my new problem. I was reading Blazark's CFD book and these are the BCs given for subsonic inflow and outflow (mine is an incompressible problem)

For inflow a belongs to outside of domain, b is on the boundary, d is inside domain. a .... b .... d





rho(0) & c(0) represents reference state

For outflow a belongs to outside of domain, b is on the boundary, d is inside domain. d .... b .... a





p(a)=prescribed static pressure

So, is this BCs applicable since this is an incompressible problem?

Also in most problems, ppl usually specify inlet velocity (e.g. u=1,v=0). Is there a need to specify pressure at

inlet as well?

  Reply With Quote

Old   April 16, 2006, 02:41
Default Re: Using compressible BCs for incompressible prob
Posts: n/a
When you specify velocity you do not usually specify pressure.Have a look at peric and ferziger for more details.

  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
Compressible Nozzle Flow sebastian OpenFOAM Running, Solving & CFD 14 September 21, 2016 10:47
Blow of compressible solver while using K-epsilon model in openfoam Amit Mathur OpenFOAM 16 October 6, 2013 11:09
Fixed grid methods for compressible viscous flow liujmljm Main CFD Forum 1 November 7, 2010 18:54
p & U outlet bcs for realistic wind inlet profile stevek OpenFOAM 4 July 19, 2010 02:29
Problems with convergence and initial guessed fields in compressible steady flows Pedro Gil Main CFD Forum 3 April 25, 2000 11:34

All times are GMT -4. The time now is 18:58.