11 citations · 22 across the 8 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…
Tuning Spectral Element Preconditioners for Parallel Scalability on GPUs
Malachi Phillips, Stefan Kerkemeier, Paul Fischer
The Poisson pressure solve resulting from the spectral element discretization of the incompressible Navier-Stokes equation requires fast, robust, and scalable preconditioning. In t…
Highly Optimized Full-Core Reactor Simulations on Summit
Paul Fischer, Elia Merzari, Misun Min +8
Nek5000/RS is a highly-performant open-source spectral element code for simulation of incompressible and low-Mach fluid flow, heat transfer, and combustion with a particular focus…
GPU Algorithms for Efficient Exascale Discretizations
Ahmad Abdelfattah, Valeria Barra, Natalie Beams +24
In this paper we describe the research and development activities in the Center for Efficient Exascale Discretization within the US Exascale Computing Project, targeting state-of-t…