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-   -   Riemann solver (http://www.cfd-online.com/Forums/openfoam/107048-riemann-solver.html)

nimasam September 16, 2012 08:26

Riemann solver
 
hi friends

1) does OpenFOAM has any Riemann solvers (http://en.wikipedia.org/wiki/Riemann_solver)?

2) Are Reimann solvers used only for Euler equation or it can be used for solving full Navier-stokes equation?

3) whats the advantages and disadvantages of using these solvers than PISO or SIMPLE algorithm to solve equations?

immortality April 19, 2013 14:15

hi dear Nima
I had heard Riemann invarient to be a boundary condition not a solver.
I found it:
Code:

Riemann
{
    secondOrder no;            // activate 2nd order extensions
    multidimLimiter yes;        // Switch between 1D and mutliD limiters
    epsilon 5;                // VK constant
    limiterName vanAlbadaSlope; // vanAlbadaSlope, MinmodSlope, vanLeerSlope
}

in this thread:
http://www.cfd-online.com/Forums/ope...tml#post369961
do you know where is its code? I couldn't find by searching.
obtain any information let me know.
thanks.

wyldckat April 19, 2013 18:00

Greetings to all!

FYI: Ehsan asked about the "Riemann" feature at another thread and I answered in post #2 on that thread: http://www.cfd-online.com/Forums/ope...tml#post421852

@nimasam: feel free to add any more information!

Best regards,
Bruno


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