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Understanding solar calculator code

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Old   December 14, 2021, 06:50
Default Understanding solar calculator code
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Bushra Rasheed
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Hi!

I am trying to understand how solar calculator calculates coordinates for sun direction. I have gone through all the formulas for calculating azimuth and altitude angle but I don't understand how open foam converts these angles into coordinates. In solarCalculator.C, there is a piece of code that calculates xyz coordinates as:
Code:
     direction_.z() = -sin(beta_);
     direction_.y() =  cos(beta_)*cos(theta_); // South axis
     direction_.x() =  cos(beta_)*sin(theta_); // West axis
The above trigonometric formulas do not consider the hypotenuse multiplication to calculates x, y and z coordinates.
I might be missing something. Please guide

Thanks!
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Old   December 21, 2021, 14:41
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Michael Alletto
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This looks like sperical coordinates
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Old   December 23, 2021, 04:42
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Federico Nahuel Ramírez
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It seems that these lines are not calculating the coordinates, but the unit vectors of x, y, and z.
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Old   December 23, 2021, 14:27
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Bushra Rasheed
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Quote:
Originally Posted by fedenr View Post
It seems that these lines are not calculating the coordinates, but the unit vectors of x, y, and z.
Yes you are right. I figured out that they are unit vectors calculated via theta and beta in radians.
Thanks!
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Old   June 13, 2023, 14:31
Default Solar calculator with transient simulation
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I've modelled a solar dryer that I want to simulate with irradiance data from the solar calculator. I would like to know how to run the simulation daily for a month for a year.

Thanks in advance for your help!
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