ISBN 9783843906296

978-3-8439-0629-6, Reihe Informatik

Jan Götz
Massively Parallel Direct Numerical Simulation of Particulate Flows

184 Seiten, Dissertation Universität Erlangen-Nürnberg (2012), Softcover, B5

Zusammenfassung / Abstract

Particulate flows are essential for many processes in nature and industry. Prominent examples are the erosion in river beds, and the mixing, separation and fluidization of materials in chemical reactors. With today's available computing power it is possible to conduct simulations of a level of detail that truly allows decisive progress in comprehending and optimizing these processes.

This thesis describes computational models for particulate flows based on a fully resolved fluid-structure interaction, which is obtained by coupling a lattice Boltzmann and a rigid body dynamics solver. Earlier methods are extended and integrated in a flexible, large-scale software framework, called waLBerla. This framework enables accurate and fast large-scale simulations of particulate flows on current supercomputing machines. waLBerla will be explained in detail, focusing both on the validation of particulate flows by means of several scenarios, as well as the high performance computing aspects, such as the optimization and parallelization of the algorithms and the performance of the simulations on different compute platforms. Furthermore performance results up to 294912 compute cores are shown.