[SUBHANKAR]

Hello folks,

I am solving for flow past a cylinder. After running the simulations i now want to get time average pressure and skin friction coefficient for entire domain and averaging has to be done for a certain interval of time. Can anybody tell how to go for it.

thanks and regards

[tomf]

Hi,

Based on what the source code documentation says, these functionobjects should give you the average pressure and wallshearstress for the entire domain. You than just need to do the division by the dynamic pressure in ParaView, to get coefficients.

    wallShearStress
    {
        type            wallShearStress;
        functionObjectLibs ("libutilityFunctionObjects.so");
        writeControl   writeTime;
        log             off; //optional
    }
    fieldAverage
    {
        type            fieldAverage;
        functionObjectLibs ( "libfieldFunctionObjects.so" );
        writeControl   writeTime;
        resetOnOutput   true; //optional
        timeStart       3000; //optional
        fields
        (
            p
            {
                mean        on;
                prime2Mean  off;
                base        time;
                window          10.0; //optional
                windowName      w1;
            }
            
            wallShearStress
            {
                mean        on;
                prime2Mean  off;
                base        time;
                window          10.0; //optional
                windowName      ws1;
            }
        );
    }

Regards,
Tom

[SUBHANKAR]

Thanks a ton Tom