Date and Place: Thursdays and hybrid (live in 32-349/online via Zoom). For detailed dates see below!
Content
In the Scientific Computing Seminar we host talks of guests and members of the SciComp team as well as students of mathematics, computer science and engineering. Everybody interested in the topics is welcome.
List of Talks
Event Information:
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Thu19Jan2017
SC Seminar: Philipp Otte
11:30SC Seminar Room 32-349
Philipp Otte, MathCCES, RWTH Aachen
Title:
Stabilization of Lattice-Boltzmann Methods by Entropic Moment ClosuresAbstract:
Over the past 25 years, the Lattice-Boltzmann Method (LBM) has risen to be a competitive player in the field of Computational Fluid Dynamics (CFD). The LBM owes its success to its simple structure and straight forward parallelization on modern-day architectures. Still, stability — especially for very large Reynold’s numbers — is an issue rendering it a problematic choice for properly simulating acoustics. In this talk, we extend the applicability of the LBM to solving the inviscid Linear Euler Equations. This is achieved by applying and extending the idea of entropic moment closures to linear collisions in the Lattice-Boltzmann framework. In contrast to most approaches for entropic collision operators, the post-collision state can be explicitly stated as linear combination of the pre-collision state avoiding the unpredictable optimization process inherent to most entropic collision operators.