TITLE:
Large-Eddy Simulation of Airflow over a Steep, Three-Dimensional Isolated Hill with Multi-GPUs Computing
AUTHORS:
Takanori Uchida
KEYWORDS:
LES, Isolated Hill, Multi-Cores Multi-CPUs Computing, Multi-GPUs Computing
JOURNAL NAME:
Open Journal of Fluid Dynamics,
Vol.8 No.4,
November
21,
2018
ABSTRACT: The present research attempted a Large-Eddy Simulation (LES) of airflow
over a steep, three-dimensional isolated hill by using the latest multi-cores
multi-CPUs systems. As a result, it was found that 1) turbulence simulations
using approximately 50 million grid points are feasible and 2) the use of this
system resulted in the achievement of a high computation speed, which exceeded
the speed of parallel computation attained by a single CPU on one of
the latest supercomputers. Furthermore, LES was conducted by using the
multi-GPUs systems. The results of these simulations revealed the following
findings: 1) the multi-GPUs environment which used the NVDIA® Tesla
M2090 or the M2075 could simulate turbulence in a model with as many as
approximately 50 million grid points. 2) The computation speed achieved by
the multi-GPUs environments exceeded that by parallel computation which
used four to six CPUs of one of the latest supercomputers.