FDS Source: Add random ray rotation for radiation angles#16368
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FDS Verification: Add example cases FDS Source: Change the random axis generation algorithm. FDS Source: Fix a silly mistake. FDS Source: Correct radiation boundary excahneg for ray rotation FDS Source: Allow mesh exchange for random rotation FDS Source: Fix radiation MPI exchange for random rotation FDS Source: Remove the energy balance logic,as it doesn't seems to do much. FDS Source: Initialize RSA FDS Source: Add a Rotation Freq Factor and cpu times FDS Source: reorganize the calc to avoid repeat calculation of FVM angles FDS Verification: Add verification cases for ray rotation FDS Verification: Delete Verification cases
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To mitigate ray effects in the wall radiative heat flux, the option RANDOMIZE_RADIATION_DIRECTIONS randomly rotates the local meridian,azimuthal, and axial coordinate system used to define the angular coordinates. If RANDOMIZE_RADIATION_DIRECTIONS is true, this rotation is performed after each complete sweep of the angular directions.