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Higher-order CFD and Interface Tracking Methods on Highly-Parallel MPI and GPU systems

J. Appleyard, D. Drikakis
Fluid Mechanics and Computational Science Department, Cranfield University, United Kingdom
Computers & Fluids (04 November 2010)

@article{appleyard2010higher,

   title={Higher-order CFD and Interface Tracking Methods on Highly-Parallel MPI and GPU systems},

   author={Appleyard, J. and Drikakis, D.},

   journal={Computers & Fluids},

   issn={0045-7930},

   year={2010},

   publisher={Elsevier}

}

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A computational investigation of the effects on parallel performance of higher-order accurate schemes was carried out on two different computational systems: a traditional CPU based MPI cluster and a system of four Graphics Processing Units (GPUs) controlled by a single quad-core CPU. The investigation was based on the solution of the level set equations for interface tracking using a High-Order Upstream Central (HOUC) scheme. Different variants of the HOUC scheme were employed together with a 3rd order TVD Runge-Kutta time integration. An increase in performance of two orders of magnitude was seen when comparing a single CPU core to a single GPU with a greater increase at higher orders of accuracy and at lower precision.
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