Highly efficient and scalable software for the simulation of turbulent flows in complex geometries

Computational Fluid Dynamics

German Research School for Simulation Sciences
Applied Supercomputing in Engineering

The BMBF funded project STEDG is concerned with turbulent flows originating from complex geometries. In this context an injection nozzle for natural gas is simulated and compared to experimental results. Supersonic conditions within the nozzle demand high temporal and spatial resolution of the investigated flow. The resolution of the fluid domain needs to be high enough to capture the highly turbulent effects that originate from the combination of nozzle geometry and flow conditions. Not only the high-frequency turbulent scales are of interest in this project but also the lower frequencies that are propagated into the far-field in the form of acoustic sound waves. These sound waves directly reflect the noise that will be emitted from the simulated configuration. The final goal is to show how the noise can be influenced using different geometric approaches within the nozzle. In order to reach this optimization step we first need to be able to fully reproduce the acoustic results from the conducted experiments.The used high-order DG scheme allows the treatment of arbitrary complex geometries while using only nearest neighbor communication and is therefore suitable for the deployment on large scale systems.