Lukas Spies

Originally from Germany, I am currently a Post-Doctoral researcher at the INRIA research center in Paris, France. There I am part of the ALPINES team which focuses on high performance scientific computing. My main research focus currently is primilarly in communication avoiding linear solvers and their inplementations in FreeFEM.

I have a Bachelors degree in Mathematics from the University of Galway (Ireland), a Masters degree in Scientific Computing from Memorial University of Newfoundland (Canada), and a PhD in Computer Science from the University of Illinois (USA).

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	Work & Education
	Since October 2024 INRIA Paris France Post-Doctoral Researcher
	August 2018 - August 2024 University of Illinois at Urbana/Champaign USA PhD in Computer Science
	August 2014 - August 2016 Memorial University of Newfoundland Canada Masters in Scientific Computing
	September 2010 - August 2014 National University of Ireland, Galway Ireland Bachelors in Mathematical Science

	Internships & Summer Schools
	June 2022 - August 2022 National Renewable Energy Laboratory, Colorado USA Graduate Research Assistant, Summer Internship
	June 2020 - August 2020 Argonne National Laboratory, Illinois USA Graduate Research Assistant, Summer Internship
	May 2019 - August 2019 Los Alamos National Laboratory, New Mexico USA Graduate Research Assistant, Summer Internship
	August 2016 - August 2017 Center for Exascale Simulation of Plasma-Coupled Combustion USA Visiting Scholar at the University of Illinois at Urbana/Champaign
	June 2016 International HPC Summer School (IHPCSS) Slovenia on HPC Challenges in Computational Sciences
	July 2015 AARMS/PIMS Summer School Canada Theme: Differential Equations and Numerical Analysis

Publications

August 2024

Spies, Lukas

Improving performance of iterative solvers on modern architectures

PhD thesis PDF

June 2024

Spies, Lukas; Olson, Luke; MacLachlan, Scott

Exploiting mesh structure to improve multigrid performance for saddle-point problems

DOI: 10.1177/10943420241261989 PDF

September 2022

Spies, Lukas; Bienz, Amanda; Moulton, David; Olson, Luke; Reisner, Andrew

Tausch: A halo exchange library for large heterogeneous computing systems using MPI, OpenCL, and CUDA

DOI: 10.1016/j.parco.2022.102973 PDF

June 2021

Kolev, Tzanio; Fischer, Paul; Min, Misun; Dongarra, Jack; Brown, Jed; Dobrev, Veselin; Warburton, Tim; Tomov, Stanimire; Shephard, Mark S; Abdelfattah, Ahmad; Barra, Valeria; Beams, Natalie; Camier, Jean-Sylvain; Chalmers, Noel; Dudouit, Yohann; Karakus, Ali; Karlin, Ian; Kerkemeier, Stefan; Lan, Yu-Hsiang; Medina, David; Merzari, Elia; Obabko, Aleksandr; Pazner, Will; Rathnayake, Thilina; Smith, Cameron W; Spies, Lukas; Swirydowicz, Kasia; Thompson, Jeremy; Tomboulides, Ananias; Tomov, Vladimir

Efficient exascale discretizations: High-order finite element methods

DOI: 10.1177/10943420211020803 Article URL

August 2016

Spies, Lukas

Structured-grid multigrid with Taylor-Hood finite elements

Masters thesis PDF

Presentations

9th August 2022

Comparison of some RANS solvers

Rocky Mountain Fluid Mechanics (RMFM) Research Symposium at CU Boulder, Colorado

24th October 2019

GMRES with Multigrid