|April 9, 2006, 01:07||
Using compressible BCs for incompressible problems
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?
|April 16, 2006, 02:41||
Re: Using compressible BCs for incompressible prob
When you specify velocity you do not usually specify pressure.Have a look at peric and ferziger for more details.
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