[cyssr]

i did a unsteady simulation
i use surfaces to output p and U of a slice
the default precision of p and U is 8,i need to change it to get higher precision
i tried to change it, but it did not work.


the setting like:

 type        surfaces;
    interpolationScheme cellPoint;
    functionObjectLibs ( "libsampling.so" );
    enabled         true; // this is just a switch on/off for that function
    writeControl   timeStep; 
    writeInterval  20; // the surface will be stored every 2nd time step (for example)
    setFormat   vtk;
    surfaceFormat    vtk;   
formatOptions
{
    surfaces
    {
         // Optional scale
        scale 1.0;
        // Optional format
        // short/long/free format
        // short: scalar field width 8. default.
        // long : scalar field width 16
        // free : comma separated, field width according to writePrecision
        //        setting
        format  long;      // short/long/free
    }

}
        fields (p U); 

    surfaces
    (
        zCut
        {
        // Cutingplane using iso surface
        type            cuttingPlane;
        planeType       pointAndNormal;
        pointAndNormalDict
        {
        point        (0 0 0.15);
        normal      (0 0 1);
        }
        interpolate     true;       
        }
    );
}

but i only get default precision,and i try to change write precison in controlDict.it also did not work , do you have any idea