Parallel implementation of a compatible high-order meshless method for the Stokes' equations
Abstract
A parallel implementation of a compatible discretization scheme for steady-state Stokes problems is presented in this work. The scheme uses generalized moving least squares to generate differential operators and apply boundary conditions. This meshless scheme allows a high-order convergence for both the velocity and pressure, while also incorporates finite-difference-like sparse discretization. Additionally, the method is inherently scalable: the stencil generation process requires local inversion of matrices amenable to GPU acceleration, and the divergence-free treatment of velocity replaces the traditional saddle point structure of the global system with elliptic diagonal blocks amenable to algebraic multigrid. The implementation in this work uses a variety of Trilinos packages to exploit this local and global parallelism, and benchmarks demonstrating high-order convergence and weak scalability are provided.
Cite
@article{arxiv.2104.14447,
title = {Parallel implementation of a compatible high-order meshless method for the Stokes' equations},
author = {Quang-Thinh Ha and Paul A. Kuberry and Nathaniel A. Trask and Emily M. Ryan},
journal= {arXiv preprint arXiv:2104.14447},
year = {2021}
}