CFD Online Discussion Forums - continue LES simulation after it stopped

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continue LES simulation after it stopped

Hi,

Am a new OpenFOAM user

Am runing LES simulation with 10,000 time step
my problem is my walltime exceeded after 12 hours, and then I need to start from the begining,
Is there a way to continue my simulation from where it stopped

best

hi
i usualy copy the field in the field 0 and i restart the calculation you can also modify the starttime in the controlDict file
good luck for your calculation

chenge the startTime entry in controlDict to latestTime

Quote:

Originally Posted by rieuk (Post 251921)

chenge the startTime entry in controlDict to latestTime

This is not entirely true, cause it will work only in the case when startFrom keyword is set to startTime.

Normally I'm using following configuration:

Code:

startFrom       latestTime;



startTime       0;

but this means I don't really need startTime at all. It's up to you which one is better, both are working fine to me.

thanks allot ill try it on Monday and come to you guys

Hi it didnt work
when I continue the program let say after 5 hours, it write from the beginning on the probes/0/p, not continue from the last time field

HTML Code:

/*--------------------------------*- C++ -*----------------------------------*\

| =========                 |                                                 |

| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |

|  \\    /   O peration     | Version:  1.6                                   |

|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |

|    \\/     M anipulation  |                                                 |

\*---------------------------------------------------------------------------*/

FoamFile

{

    version     2.0;

    format      ascii;

    class       dictionary;

    location    "system";

    object      controlDict;

}

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



application     pisoFoam;



startFrom       latestTime;



startTime       0;



stopAt          endTime;



endTime         1e-03 ;



deltaT          1e-05;



writeControl    timeStep;



writeInterval   100;



purgeWrite      0;



writeFormat     ascii;



writePrecision  12;



writeCompression uncompressed;



timeFormat      general;



timePrecision   6;



runTimeModifiable yes;



functions

{

    probes

    {

        type            probes;

        functionObjectLibs ("libsampling.so");

        enabled         true;

        outputControl   timeStep;

        outputInterval  1;

        probeLocations

        (

            ( 0.0254 0.0253 0 )

            ( 0.0508 0.0253 0 )

            ( 0.0762 0.0253 0 )

            ( 0.1016 0.0253 0 )

            ( 0.127 0.0253 0 )

            ( 0.1524 0.0253 0 )

            ( 0.1778 0.0253 0 )

        );



        fields

        (

            p

        );

    }



    fieldAverage1

    {

        type            fieldAverage;

        functionObjectLibs ("libfieldFunctionObjects.so");

        enabled         true;

        outputControl   outputTime;

        fields

        (

            U

            {

                mean        on;

                prime2Mean  on;

                base        time;

            }



            p

            {

                mean        on;

                prime2Mean  on;

                base        time;

            }

        );

    }

}





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

Is this problem concerns only p or U either?

I have no experience with functions in OF yet, but have that feeling like it has to do something with the outputControl. Look that you are using different statements in probes and fieldAverage1.

I might be wrong, so help from other more advanced users would be here appreciated :)

mmm
I really didnt understand

But I still have the same problem

Sorry, maybe I didn't make myself clear enough. I was just wondering why you're using different values in case of outputControl keyword here:

Code:

    probes

    {

        ...

        outputControl   timeStep;

and here:

Code:

    fieldAverage1

    {

        ...

        outputControl   outputTime;

Is there any specific reason for doing like that?

-----
I found something interesting >>here<<

Actually I dont know
i just copied paste the constDict from the
~/tutorials/incompressible/pisoFoam/les/pitzDaily