[djerezg]

Hi to all,

I found that MULES method can be used as a semi implicit method, but I really dont understand very well how this works.

On the page where this method is presented says: "It first executes an implicit predictor step, based on purely bounded numerical operators, e.g. Euler implicit in time, upwind for convection, etc., before constructing an explicit correction on which the MULES limiter is applied. This approach maintains boundedness and stability at an arbitrarily large Courant number."

So, firts calculate the cell with implicit method and then use an explicit correction with courant number? how is that, choose other delta t?

Sorry if a asking questions with no sense, im a begginer in OpenFOAM.

Greetings!

[qutadah.r]

I see no one has answered your question, I have another question, since it says semi-implicit is introduced i think in version 2.14, and now its version 9, which method is the standard MULES, semi-implicit or explicit?

[Bloerb]

    "alpha.liquid.*" 
    { 
        cAlpha          0; 
        nAlphaCorr      2; 
        nAlphaSubCycles 2; 

        MULESCorr       yes; 
        nLimiterIter    1; 

        solver          smoothSolver; 
        smoother        symGaussSeidel; 
        tolerance       1e-8; 
        relTol          0; 
    }

The semi-implicit version of MULES can be switched on through the MULESCorr switch. Hasn't changed since it's release in 2.3.0

[qutadah.r]

thank you, how do I know if my MULES algorithm is operating in the PIMPLE or PISO mode? Did I understand this correctly? It uses the subcycling but each individual subcycle operates normally as a PIMPLE/PISO algorithm?


Can I force it to work in one mode or another ? Or does it fully depend on what values i used for the nOuterCorrectors?



Thanks!