An efficient parallel immersed boundary algorithm using a pseudo-compressible fluid solver

JOURNAL OF COMPUTATIONAL PHYSICS

卷:281

Article

Wiens, Jeffrey K.¹  Stockie, John M.¹ 

[1] Simon Fraser Univ, Dept Math, Burnaby, BC V5A 1S6, Canada

关键词: Immersed boundary method;    Fluid-structure interaction;    Fractional step method;    Pseudo-compressibility method;    Domain decomposition;    Parallel algorithm;   

DOI  :  10.1016/j.jcp.2014.10.058

来源: Elsevier

【 摘 要 】

We propose an efficient algorithm for the immersed boundary method on distributed-memory architectures that has the computational complexity of a completely explicit method and also has excellent parallel scaling. The algorithm utilizes the pseudo-compressibility method recently proposed by Guermond and Minev that uses a directional splitting strategy to discretize the incompressible Navier-Stokes equations, thereby reducing the linear systems to a series of one-dimensional tridiagonal systems. We perform numerical simulations of several fluid-structure interaction problems in two and three dimensions and study the accuracy and convergence rates of the proposed algorithm. We also compare the proposed algorithm with other second-order projection-based fluid solvers. Lastly, the execution time and scaling properties of the proposed algorithm are investigated and compared to alternate approaches. (C) 2014 Elsevier Inc. All rights reserved.

【 授权许可】

Free