126 citations · 239 across the 10 of their papers we have counts for
10 papers
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…
Effect of Sediment Form and Form Distribution on Porosity: A Simulation Study Based on the Discrete Element Method
Christoph Rettinger, Ulrich Rüde, Stefan Vollmer +1
Porosity is one of the key properties of dense particle packings like sediment deposits and is influenced by a multitude of grain characteristics such as their size distribution an…
Coupling fully resolved light particles with the Lattice Boltzmann method on adaptively refined grids
Lukas Werner, Christoph Rettinger, Ulrich Rüde
The simulation of geometrically resolved rigid particles in a fluid relies on coupling algorithms to transfer momentum both ways between the particles and the fluid. In this articl…
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…
An efficient four-way coupled lattice Boltzmann - discrete element method for fully resolved simulations of particle-laden flows
Christoph Rettinger, Ulrich Rüde
A four-way coupling scheme for the direct numerical simulation of particle-laden flows is developed and analyzed. It employs a novel adaptive multi-relaxation time lattice Boltzman…
waLBerla: A block-structured high-performance framework for multiphysics simulations
Martin Bauer, Sebastian Eibl, Christian Godenschwager +8
Programming current supercomputers efficiently is a challenging task. Multiple levels of parallelism on the core, on the compute node, and between nodes need to be exploited to mak…
Dynamic Load Balancing Techniques for Particulate Flow Simulations
Christoph Rettinger, Ulrich Rüde
Parallel multiphysics simulations often suffer from load imbalances originating from the applied coupling of algorithms with spatially and temporally varying workloads. It is thus…
A Coupled Lattice Boltzmann Method and Discrete Element Method for Discrete Particle Simulations of Particulate Flows
Christoph Rettinger, Ulrich Rüde
Discrete particle simulations are widely used to study large-scale particulate flows in complex geometries where particle-particle and particle-fluid interactions require an adequa…
A comparative study of fluid-particle coupling methods for fully resolved lattice Boltzmann simulations
Christoph Rettinger, Ulrich Rüde
The direct numerical simulation of particulate systems offers a unique approach to study the dynamics of fluid-solid suspensions by fully resolving the submerged particles and with…