TY - JOUR
T1 - Application of Parallel Aggregation-Based Multigrid to High Resolution Subsurface Flow Simulations
AU - Chen , Meng-Huo
AU - Sun , Shuyu
JO - International Journal of Numerical Analysis and Modeling
VL - 6
SP - 873
EP - 890
PY - 2019
DA - 2019/08
SN - 16
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/ijnam/13258.html
KW - Parallel computation, porous media flow, multi-points flux approximations, algebraic multigrid.
AB - <p style="text-align: justify;">In this paper we assess the parallel efficiency issues for simulating single phase subsurface flow in porous media, where the permeability tensor contains anisotropy rotated with certain
angles or severe discontinuity. Space variables are discretized using multi-points flux approximations and the pressure equations are solved by aggregation-based algebraic multigrid method. The
involved issues include the domain decomposition of space discretization and coarsening, smoothing, the coarsest grid solving of multigrid solving steps. Numerical experiments exhibit that the
convergence of the multigrid algorithm suffers from the parallel implementation. The linear system
at the coarsest grid is solved and by various iterative methods and the experimental results show
that the parallel efficiency is less attenuated when sparse approximate inverse preconditioning
conjugate gradient is used.</p>