20 citations · 54 across the 12 of their papers we have counts for
13 papers
Mixed-Precision Computing for Scientific Discovery: Formats, Co-Design, and Responsible Approximation
Emmanuel Agullo, Hartwig Anzt, Daniel Bauer +37
Reduced and mixed precision have moved from a niche optimization to a central design axis in scientific computing and engineering, driven by energy constraints, heterogeneous accel…
TERRA-NG v1.0: Extreme-Scale, GPU-accelerated Mantle Convection
Fabian Böhm, Nils Kohl, Ponsuganth Ilangovan +7
We present TERRA-NG, a portable, GPU-accelerated, matrix-free mantle-convection code. A single Kokkos C++ implementation runs at scale on NVIDIA, AMD, and Intel GPU supercomputers.…
Performance Analysis of Low-Order, GPU-accelerated Finite Element Kernels using Kokkos
Fabian Böhm, Nils Kohl, Harald Köstler +1
We study performance portability for low-order, matrix-free finite element kernels, using the example of a vectorial, variable-coefficient PDE operator originating in geophysical m…
A Continuous Benchmarking Infrastructure for High-Performance Computing Applications
Christoph Alt, Martin Lanser, Jonas Plewinski +5
For scientific software, especially those used for large-scale simulations, achieving good performance and efficiently using the available hardware resources is essential. It is im…
Fundamental Data Structures for Matrix-Free Finite Elements on Hybrid Tetrahedral Grids
Nils Kohl, Daniel Bauer, Fabian Böhm +1
This paper presents efficient data structures for the implementation of matrix-free finite element methods on block-structured, hybrid tetrahedral grids. It provides a complete cat…
Model-Based Performance Analysis of the HyTeG Finite Element Framework
Dominik Thönnes, Ulrich Rüde
In this work, we present how code generation techniques significantly improve the performance of the computational kernels in the HyTeG software framework. This HPC framework combi…
Scalable Flow Simulations with the Lattice Boltzmann Method
Markus Holzer, Jayesh Badwaik, Radim Vavrik +7
The primary goal of the EuroHPC JU project SCALABLE is to develop an industrial Lattice Boltzmann Method (LBM)-based computational fluid dynamics (CFD) solver capable of exploiting…
Efficiency and scalability of fully-resolved fluid-particle simulations on heterogeneous CPU-GPU architectures
Samuel Kemmler, Christoph Rettinger, Ulrich Rüde +2
Current supercomputers often have a heterogeneous architecture using both CPUs and GPUs. At the same time, numerical simulation tasks frequently involve multiphysics scenarios whos…
Particle-resolved simulation of antidunes in free-surface flows
Christoph Schwarzmeier, Christoph Rettinger, Samuel Kemmler +5
The interaction of supercritical turbulent flows with granular sediment beds is challenging to study both experimentally and numerically; this challenging task has hampered the adv…
Advanced Automatic Code Generation for Multiple Relaxation-Time Lattice Boltzmann Methods
Frederik Hennig, Markus Holzer, Ulrich Rüde
The scientific code generation package lbmpy supports the automated design and the efficient implementation of lattice Boltzmann methods (LBMs) through metaprogramming. It is based…
Inexact inner-outer Golub-Kahan bidiagonalization method: A relaxation strategy
Vincent Darrigrand, Andrei Dumitrasc, Carola Kruse +1
We study an inexact inner-outer generalized Golub-Kahan algorithm for the solution of saddle-point problems with a two-times-two block structure. In each outer iteration, an inner…
Comparison of refilling schemes in the free-surface lattice Boltzmann method
Christoph Schwarzmeier, Ulrich Rüde
Simulating mobile liquid-gas interfaces with the free-surface lattice Boltzmann method (FSLBM) requires frequent re-initialization of fluid flow information in computational cells…
Rheology of mobile sediment beds in laminar shear flow: effects of creep and polydispersity
Christoph Rettinger, Sebastian Eibl, Ulrich Rüde +1
Classical scaling relationships for rheological quantities such as the -rheology have become increasingly popular for closures of two-phase flow modeling. However, these fram…