Comparison of parallel solvers for Moving Particle Semi-Implicit method
Abstract
Purpose
The purpose of this paper is to find the best solver for parallelizing particle methods based on solving Pressure Poisson Equation (PPE) by taking Moving Particle Semi-Implicit (MPS) method as an example because the solution for PPE is usually the most time-consuming part difficult to parallelize.
Design/methodology/approach
To find the best solver, the authors compare six Krylov solvers, namely, Conjugate Gradient method (CG), Scaled Conjugate Gradient method (SCG), Bi-Conjugate Gradient Stabilized (BiCGStab) method, Conjugate Gradient Squared (CGS) method with Symmetric Lanczos Algorithm (SLA) method and Incomplete Cholesky Conjugate Gradient method (ICCG) in terms of convergence, time consumption, parallel efficiency and memory consumption for the semi-implicit particle method. The MPS method is parallelized by the hybrid Open Multi-Processing (OpenMP)/Message Passing Interface (MPI) model. The dam-break flow and channel flow simulations are used to evaluate the performance of different solvers.
Findings
It is found that CG converges stably, runs fastest in the serial way, uses the least memory and has highest OpenMP parallel efficiency, but its MPI parallel efficiency is lower than SLA because SLA requires less synchronization than CG.
Originality/value
With all these criteria considered and weighed, the recommended parallel solver for the MPS method is CG.
Keywords
Acknowledgements
The research is supported by National Science Foundation of China (50976087, 51121092).
Citation
Duan, G. and Chen, B. (2015), "Comparison of parallel solvers for Moving Particle Semi-Implicit method", Engineering Computations, Vol. 32 No. 3, pp. 834-862. https://doi.org/10.1108/EC-02-2014-0029
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited