Graphics Processing Units (GPUs), originally developed for computer games, now provide computational power for scientific applications. In this paper, we develop a general purpose Lattice Boltzmann code that runs entirely on a single GPU. The results show that: (1) simple-precision floating point arithmetic is sufficient for LBM computation in comparison to double-precision; (2) the implementation of LBM on GPUs allows to achieve up to about one billion lattice update per second using single-precision floating point; (3) GPUs provide an inexpensive alternative to large clusters for fluid dynamics prediction.
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