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Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 18:44
Replies: 30
Views: 10,082
Posted By vatant
I actually ran lot of cases wi

I actually ran lot of cases with OpenFoam compressible codes with different flow velocities and the convergence was good . I did experience some problems in injector flows with sharp corners... ...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 18:03
Replies: 30
Views: 10,082
Posted By vatant
I am still running openFoam 1.

I am still running openFoam 1.0 which has implicit convection solves..you think i might have any problem in convergence since convection is not done explicit taking it away from elliptic ?

Does...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 17:25
Replies: 30
Views: 10,082
Posted By vatant
Incompressible flows would rep

Incompressible flows would represent elliptic, solving laplacian (p) == div (phi)..

In the sonicFoam, the pEqn has the extra time derivative term with compressiblity effect,

ddt(psi,p)+ div...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 17:08
Replies: 30
Views: 10,082
Posted By vatant
why is that the convergence pr

why is that the convergence problem be easily handled with elliptic systems ?

The derived pEqn from continuity and momentum eqn was of the form d/dt(p) + laplacian(..,p)+div(phi)...=0 , is it...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 16:38
Replies: 30
Views: 10,082
Posted By vatant
For the analysis of compressib

For the analysis of compressible flows, it is possible that some regions of the flow domain
such as in the boundary layers have low speeds and thus are incompressible. This low velocities result...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 16:10
Replies: 30
Views: 10,082
Posted By vatant
I am solving transient flows a

I am solving transient flows and was wondering if rho and p relations are not explicity given (unlike ideal gas relation), how does this pressure correction method works?

Is the pressure...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 15:51
Replies: 30
Views: 10,082
Posted By vatant
does the term 'dp/dt' vanish a

does the term 'dp/dt' vanish after reaching certain tolerance level ? what is this method for solving compressible flow called?
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 15:40
Replies: 30
Views: 10,082
Posted By vatant
Is the implementation same as

Is the implementation same as artificial compressibility method ?
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 15:33
Replies: 30
Views: 10,082
Posted By vatant
Hello In compressible liqu

Hello

In compressible liquid/gas flows, the pEqn reads :

(
fvm::ddt(psi,p)+fvc::div(phi)+fvm::div(phid,p,"..")-fvm::laplacian(..,p)
)

where as in an incompressible code pEqn is...
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