CFD Online Discussion Forums - why adjustableRunTime doesn't work in sonicFoam?

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- - why adjustableRunTime doesn't work in sonicFoam? (https://www.cfd-online.com/Forums/openfoam-solving/113066-why-adjustableruntime-doesnt-work-sonicfoam.html)

why adjustableRunTime doesn't work in sonicFoam?

my controlDict is as below:

Code:

FoamFile

{

    version     2.0;

    format      ascii;

    class       dictionary;

    location    "system";

    object      controlDict;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



application     rhoPimpleFoam;



startFrom       latestTime;



startTime       0;



stopAt          endTime;



endTime         .02;//0.020708089



deltaT          5.6e-9;



writeControl    adjustableRunTime;



writeInterval   .000001;



purgeWrite      0;



writeFormat     binary;



writePrecision  10;



writeCompression on;



timeFormat      general;



timePrecision   6;



runTimeModifiable true;



adjustTimeStep  yes;



maxCo           0.1;



maxDeltaT       .0001;



libs ( "libOpenFOAM.so" "libgroovyBC.so" ) ;

but courant goes high as 20...50 and only decrease when i lessen deltaT or maxdeltaT.does not this solver support this feature to control CFL number?how can i modify it to involve it?

sonicFoam does not have this currently implemented. To add this, try looking at

http://www.cfd-online.com/Forums/ope...nt-number.html

or, you could look at the transient solvers that have the ability to adjust time-step size based on courant number. For inspiration, look at interFoam, rhoPimpleFoam, or bubbleFoam. You are looking at the lines

Code:

    

.

.

.

        #include "setInitialDeltaT.H"

.

.

.



        #include "setDeltaT.H"

.

.

.

and their placement before or within the time-loop after the Courant number is determined for the flow. Look in the directory

Code:

$FOAM_SRC/finiteVolume/cfdTools/general/include

for the source of these files. Good luck.

Regarding the solvers..

Why do we need both together "setinitialDeltaT.H" & "setDeltaT.H" ?

Please correct me if I am wrong.

Thanks in advance.