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BUG: Correcting calculation of azimuth angle in the solar direction

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This commit is contained in:
sergio
2017-02-09 13:13:45 -08:00
parent 21636f241a
commit 53502f79b8
1 changed files with 16 additions and 3 deletions
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19
src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.C
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@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015 OpenCFD Ltd.
\\/ M anipulation |
\\/ M anipulation | Copyright (C) 2017 OpenCFD Ltd
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -26,6 +26,9 @@ License
#include "solarCalculator.H"
#include "Time.H"
#include "unitConversion.H"
#include "constants.H"
using namespace Foam::constant;
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
@ -104,6 +107,14 @@ void Foam::solarCalculator::calculateBetaTetha()
beta_ = max(asin(cos(L)*cos(deltaRad)*cos(H) + sin(L)*sin(deltaRad)), 1e-3);
tetha_ = acos((sin(beta_)*sin(L) - sin(deltaRad))/(cos(beta_)*cos(L)));
// theta is the angle between the SOUTH axis and the Sun
// If the hour angle is lower than zero (morning) the Sun is positioned
// on the East side.
if (H < 0)
{
tetha_ += 2*(constant::mathematical::pi - tetha_);
}
if (debug)
{
Info << tab << "altitude : " << radToDeg(beta_) << endl;
@ -126,9 +137,10 @@ void Foam::solarCalculator::calculateSunDirection()
new coordinateSystem("grid", Zero, gridUp_, eastDir_)
);
// Assuming 'z' vertical, 'y' North and 'x' East
direction_.z() = -sin(beta_);
direction_.y() = cos(beta_)*cos(tetha_); //North
direction_.x() = cos(beta_)*sin(tetha_); //East
direction_.y() = cos(beta_)*cos(tetha_); // South axis
direction_.x() = cos(beta_)*sin(tetha_); // West axis
direction_ /= mag(direction_);
@ -137,6 +149,7 @@ void Foam::solarCalculator::calculateSunDirection()
Info<< "Sun direction in absolute coordinates : " << direction_ <<endl;
}
// Transform to actual coordinate system
direction_ = coord_->R().transform(direction_);
if (debug)