[amuzeshi]

Hello,
I want to use an average pressure at a section as a reference pressure for pressure coefficient calculation. I have included the following function objects in my controlDict for pressure averaging and calculation of Cp:

averagedPressure
        {
            type            surfaceFieldValue;
            libs            (fieldFunctionObjects);
            enabled         true;

            writeControl    onEnd;
            executeControl  onEnd;
            writeFields     true;
            result          pRef;
            surfaceFormat   none;
     
            regionType      sampledSurface;
            name            sampledP;
            sampledSurfaceDict
            {
                type            cuttingPlane;
                planeType       pointAndNormal;
                pointAndNormalDict
                {
                    point     (-1.7 0 0.4);
                    normal    (1 0 0);
                }
                interpolate     true;
            }
            operation       areaAverage;
            fields          ( p );
        }

        pressure
        {
            type            pressure;
            libs            (fieldFunctionObjects);
            executeControl      onEnd;
            writeControl        onEnd;
            result              Cp;
            mode            staticCoeff;

            rho             rhoInf;
            rhoInf          1.0; 
            pInf              0;
      
            U               UInf;
            UInf            (1 0 0);

        }

Now I don't no how to use the calculated average pressure as a reference pressure for Cp (shown in red).

Ali

[rouco75]

Have you achieved a solution, I am facing the same problem

[amuzeshi]

Originally Posted by rouco75

Have you achieved a solution, I am facing the same problem

No, but it was not due to that it is not possible, but because of my limited amount of time.
Instead, I ran the case one time in order to obtain the average pressure in the reference section, then ran it again and used the calculated reference pressure as pInf.