Parallel Implementations of the Euros Model: The Algorithm and Some Preliminary Results
A short description of the EUROS model as well as a parallel algorithm for its implementation on high performance computer platforms is presented. Different parallelization strategies (chemical decomposition, horizontal decomposition and vertical decomposition) are described and analysed. Taking into account the advantages and disadvantages of each of the three approaches some conclusions about the optimal strategy for an implementation of the EUROS model on the existing at VITO parallel computer architecture are done. The first parallel version of EUROS is based on the domain decomposition approach. Different decompositions of the model domain are used for the different submodels obtained after a splitting procedure: (i) with an overlap for the horizontal advection and diffusion and (ii) nonoveralpping for the submodels describing the other physical and chemical processes. The grid refinement procedure used in EUROS leads to some difficulties in the load balancing. They are discussed in the paper and an algorithm to avoid them is presented.
KeywordsModel Domain Atmospheric Boundary Layer Domain Decomposition Parallelization Strategy Local Refinement
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