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

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

radiation       on;

radiationModel  solarLoad;

solarLoadCoeffs
{
    // Calculate reflected/secondary heat fluxes
    useVFbeamToDiffuse  true;

    // Sun direction ray model. Give the sunDirection or calculated using the
    // (solar calculator)
    sunDirectionModel   sunDirTracking;//sunDirConstant;

        // Time interval to update Sun position (sec)
        sunTrackingUpdateInterval 800;

        //sunDirection        (-1 1 -1);

        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)

        // Grid orientation
        gridUp                  (0 0 1);
        gridEast                (1 0 0);

    // Energy spectrum
    spectralDistribution (1 1);

    // Solar model:

        // sunLoadConstant-sunLoadFairWeatherConditions-SunLoadTheoreticalMaximum;
        sunLoadModel sunLoadFairWeatherConditions;

        // Sun load constant model
        directSolarRad  500;    // [w/m2]
        diffuseSolarRad 40;     // [w/m2]

        // Fair Weather Conditions Model Constants.
        // Calculate beta from the Solar calculator or input
        A       300;        // Apparent solar irradiation at air mass m = 0
        B       0.142;      // Atmospheric extinction coefficient
        //beta    45;       // Solar altitude (in degrees) above the horizontal

        // Theoretical maximum model constants
        Setrn       10;
        SunPrime    1;

        // Ground reflectivity
        groundReflectivity 0.2;

        // Solar diffusivity constants
        C   0.058;  // Model constant

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


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

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

absorptionEmissionModel none;

scatterModel    none;

sootModel       none;

transmissivityModel none;

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