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Large-Eddy Simulation of Airflow over a Steep, Three-Dimensional Isolated Hill with Multi-GPUs Computing

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Document pages: 19 pages

Abstract: The present research attempted a Large-Eddy Simulation (LES) of airflowover a steep, three-dimensional isolated hill by using the latest multi-coresmulti-CPUs systems. As a result, it was found that 1) turbulence simulationsusing approximately 50 million grid points are feasible and 2) the use of thissystem resulted in the achievement of a high computation speed, which exceededthe speed of parallel computation attained by a single CPU on one ofthe latest supercomputers. Furthermore, LES was conducted by using themulti-GPUs systems. The results of these simulations revealed the followingfindings: 1) the multi-GPUs environment which used the NVDIA® TeslaM2090 or the M2075 could simulate turbulence in a model with as many asapproximately 50 million grid points. 2) The computation speed achieved bythe multi-GPUs environments exceeded that by parallel computation whichused four to six CPUs of one of the latest supercomputers.

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