SC²S Colloquium - Sep 19, 2018

Date:	Sep 19, 2018
Room:	02.07.023
Time:	15:00 - 15:30

Piet Jarmatz: Parallel Noise Reduction for Transient Molecular-Continuum Coupled Flow Simulations

This is a Master's Thesis submission talk advised by Philipp Neumann

Molecular-Continuum coupled flow simulations often suffer from high thermal noise, created by fluctuating hydrodynamics within the molecular dynamics simulation. Filtering particle-based simulation data, using signal processing methods to reduce this noise, can lead to improved stability and reduced computational cost. In the Master's Thesis I compare many different noise reduction algorithms from a CFD perspective, under the main aspects of parallelization and filtering efficiency. I present an implementation of a massively parallel noise filter, using Proper Orthogonal Decomposition, for the Macro-Micro-Coupling tool. The resulting coupled simulation is examined using a three-dimensional Couette Flow scenario. To demonstrate the advantages of this approach, I show filtering results and quantify the denoising, conduct performance benchmarks and scaling tests on a supercomputing platform.

Keywords: Multiscale, fluid dynamics