openfoam/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2212                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      radiationProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

radiation       on;

radiationModel  viewFactor;

solarLoadCoeffs
{
    sunDirectionModel   tracking;

        sunTrackingUpdateInterval 800; // Time interval to update Sun position
        localStandardMeridian     9;       // GMT offset (hours)
        startDay                  204;     // day of the year
        startTime                 15;      // time of the day (hours decimal)
        longitude                 139.74;  // longitude (degrees)
        latitude                  35.658;  // latitude (degrees)
        gridUp                    (0 0 1); // grid orientation
        gridEast                  (1 0 0);


    sunLoadModel    fairWeather;

        // Fair weather conditions model constants
        // Calculate beta from the Solar calculator or input
        groundReflectivity 0.2;
        A       500;   // Apparent solar irradiation at air mass m = 0
        B       0.142; // Atmospheric extinction coefficient
        C       0.058; // Solar diffusivity constant
        //beta    45;  // Solar altitude (in degrees) above the horizontal


    // see solarCalculator.H for other model examples and details


    // Energy spectrum
    spectralDistribution (2 1);


    // Radiative flux coupling flags
    solidCoupled    true;  //Couple through qr the solid regions (default true)
    wallCoupled     false; //Couple through qr wall patches (default false)

    // Reflecting rays
    useReflectedRays true;
    reflecting
    {
        nPhi        10;
        nTheta      10;
    }

    absorptionEmissionModel none;
    scatterModel            none;
    sootModel               none;
}


viewFactorCoeffs
{
    smoothing true; //Smooth view factor matrix (use when in a close surface
                    //to force Sum(Fij = 1)
    constantEmissivity true; //constant emissivity on surfaces.

    nBands    2;

    useSolarLoad       true;
}

// Number of flow iterations per radiation iteration
solverFreq 1;

absorptionEmissionModel none;

scatterModel    none;

sootModel       none;


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