11 citations · 22 across the 7 of their papers we have counts for
9 papers
Coarse Solvers for Exascale Solution of Poisson Problems
Thilina Ratnayaka, Paul Fischer, Luke Olson
We present a two-level Schwarz method as an alternative to Algebraic Multigrid method(AMG) used as the last level (coarse) solver of the p-multigrid pMG preconditioner for pressure…
parRSB: Exascale Spectral Element Mesh Partitioning
Thilina Ratnayaka, Paul Fischer
We introduce parRSB - a parallel, highly scalable graph partitioner for spectral element meshes that produce high quality partitions. parRSB is based on Recursive Spectral Bisectio…
Exascale Simulations of Fusion and Fission Systems
Misun Min, Yu-Hsiang Lan, Paul Fischer +11
We discuss pioneering heat and fluid flow simulations of fusion and fission energy systems with NekRS on exascale computing facilities, including Frontier and Aurora. The Argonne-b…
Nek5000/RS Performance on Advanced GPU Architectures
Misun Min, Yu-Hsiang Lan, Paul Fischer +2
We demonstrate NekRS performance results on various advanced GPU architectures. NekRS is a GPU-accelerated version of Nek5000 that targets high performance on exascale platforms. I…
Optimal Chebyshev Smoothers and One-sided V-cycles
Malachi Phillips, Paul Fischer
The solution to the Poisson equation arising from the spectral element discretization of the incompressible Navier-Stokes equation requires robust preconditioning strategies. One s…
Towards Exascale for Wind Energy Simulations
Misun Min, Michael Brazell, Ananias Tomboulides +3
We examine large-eddy-simulation modeling approaches and computational performance of two open-source computational fluid dynamics codes for the simulation of atmospheric boundary…