An example of using binField to create a force x-ray

forceCoeffs

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2206                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/

// Calculate lift force coefficient acting on the motorbike patch group
// Then "bin" that data along the X & Y axes to create a force x-ray

// Force Calculation & Write Field
forceCoeffs
{
    type            forceCoeffs;
    libs            (forces);
    writeControl    writeTime;
    writeFields     true;

    patches         (motorBikeGroup);
    p               p;
    U               U;
    rho             rhoInf;      	// Indicates incompressible
    log             true;
    rhoInf          1;           	// Required when rho = rhoInf
    liftDir         (0 0 1);
    dragDir         (1 0 0);
    CofR            (0 0 0);
    pitchAxis       (0 1 0);
    magUInf         20;
    lRef            1;          	// Reference Length
    Aref            1;          	// Frontal Area

    // Turn on to include forces from porous zones 
    porosity        off;
    
    // New v2206 feature: only output Cl (lift) data
    coefficients    (Cl);
}

// Bin Force Data
binField
{
    type                    binField;
    libs                    (fieldFunctionObjects);
    writeControl            writeTime;
    
    // uniformBin: bin data along mulitple axes
    binModel                uniformBin;
    
    // bin force data from previous calc
    fields                  (forceCoeff);

    // only bin forces acting on the motorBikeGroup
    patches                 (motorBikeGroup);
    
    // decomposePatchValues
    // - no: 	write total force for each bin
    // - yes: 	write total, pressure & viscous force components for each bin
    decomposePatchValues    no;

    // Set the datum for the binned data & uses the std cartesian axes
    // (TIP: use origin to avoid confusion)
    CofR                    (0 0 0);

    // specify cellZones if porous zone forces are required
    cellZones               ();

    binData
    {
        // number of bins required in XYZ directions
        nBin        (21 8 1);
        
        // Optional: specify min & max for directions of interest
        // the bounding box of the specifed patches is used by default
        minMax
            {
                e0       (-0.3 1.8);	// min-max in X-Direction
                e1       (-0.4 0.4);	// min-max in Y-Direction
            }

        // Report each bin force independently
        // i.e. do not accumulate forces across the bins
        cumulative  no;
    }

}

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