The present work is reporting the experience on different aspects of using supercomputers for CFD applications. Several problems that appear with new supercomputers built of multi-core nodes are considered. In particular, it is a problem of increased influence of irregular memory access, problems with efficient use of such a big numbers of processors that are available in present time. A hybrid parallelization using MPI and OpenMP technologies is also considered to improve efficiency of computations. Results of performance tests where the hybrid approach outperformed the MPI-only parallelization are shown. Finally, a performance comparison of Marenostrum and MVS-50000 supercomputers is presented, illustrative numerical results on the DNS of turbulent flows are also included. © 2010 Springer.
CITATION STYLE
Gorobets, A. V., Kozubskaya, T. K., & Soukov, S. A. (2011). On efficiency of supercomputers in CFD simulations. In Lecture Notes in Computational Science and Engineering (Vol. 74 LNCSE, pp. 347–354). https://doi.org/10.1007/978-3-642-14438-7_37
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