SPATIAL VERSUS ANGULAR PARALLELIZATION FOR SOLUTION OF RADIATIVE TRANSFER EQUATION IN PARTICIPATING MEDIA
M.A. Badri, Yann Favennec, Pierre Jolivet, D. Le Hardy, Steven Le Corre, Benoît Rousseau · 2017
This paper presents two very different methods of parallelization applicable to the solution of the multi-dimensional monochromatic radiative transfer equation. Algorithms concerning the two methods, namely angular decomposition methods and domain decomposition methods, are separately developed using the Message Passing Interface (MPI) and implemented in order to achieve fast and memory efficient solutions. A detailed comparison of performance and scalability on thousands of processors is established for both methods.