DNS of Cylinder Flow

Key Facts: • DNS of a cylinder flow at Re=3900 • Polynomial degree N=7 • 4,992 compute cores, 4 Mio CPU-hours @ HLRS Cray XE6 • 170 million degrees of freedom per variable

The Taylor-Green Vortex

To assess the attributes of the discontinuous Galerkin spectral element method (DGSEM) for both direct numerical (DNS) and large eddy simulations (LES), the prominent Taylor-Green Vortex has been thoroughly investigated for up to high polynomial degrees N. Key Facts: • Re=5000 • up to 125,000 compute cores @ HLRS Nehalem and Jugene (Juelich) • Polynomial […]

High Performance Computing

With increasing computational power, today’s simulations have also developed into a high performance computing (HPC) problem. Thus, the applied numerical method should allow to efficiently exploit the computational and memory resources provided by supercomputing systems. In this context, high-order discontinuous Galerkin spectral element methods (DGSEM) are known for their high potential of massively parallelization. In […]

The Multicore Challenge: Petascale DNS of a Spatially-Developing Supersonic Turbulent Boundary Layer up to High Reynolds Numbers with Flexi

A research team from the Institute for Aerodynamics and Gas Dynamics in Stuttgart and the University of Maryland in College Park conducted a direct numerical simulation of flat plate boundary layer using the discontinuous Galerkin spectral element method (DGSEM) on the HLRS Cray XC40 cluster. This project aimed at demonstrating the high potential of the […]

Simulation of Aeroacoustic Feedback Phenomena on a Side-view Mirror

In order to analyze aeroacoustic noise generation processes, researchers from the Institute for Aerodynamics and Gas Dynamics in Stuttgart have performed high fidelity, large-scale flow and acoustic computations using the discontinuous Galerkin spectral element method (DGSEM) on the HPC system Cray XC40 Hornet at the High Performance Computing Center Stuttgart (HLRS). The aim of this […]