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Prof. Dr. Nikolaus A. Adams Mechanical Engineering, June 7, 2017 |
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SEMINAR ABSTRACT:For decades the direct numerical simulation (DNS) and the Large-Eddy Simulation (LES) of turbulent single-phase lowspeed flows was one of the prime challenges for highperformance computing (HPC) In particular the improvements in numerical model development for multiphysics problems has enabled the research in fluid mechanics nowadays to consider more complex problems. Fluid flow is characterized by nonlinear mechanisms that generate multiple temporal and spatial scales. Turbulence is a broad-band phenomenon whose largest scales are determined by flow boundaries and exterior forcing, and whose smallest scales are determined by viscous dissipation length scales. Singularities such as shocks and interfaces do not possess inherent length and time scales if considered in a continuum description and interact with broad-band flow structures, generating a scenario which is extremely complex for numerical flow modeling: high-resolution requirement of broad-band scales, monotonic capturing of shocks and interface, tracking of interfaces without artificial diffusion and mass loss. In the talk we will discuss recent approaches towards efficient models and algorithms for sharp-interface models that allow to enforce critical properties of the numerical representation, such as conservation and high resolution, without compromising efficient computing strategies. We will present a range of applications demonstrating the performance of the devised methods, in particular, reacting shock-bubble interaction, aerobreakup of droplets, and shock interactions with complex layered materials. |
SPEAKER INTRODUCTION:Professor Adams conducts research focusing on the modeling of transitional and turbulent flows, fluidstructure interaction, microfluidics, multi-phase flows, and numerical methods. He also performs experimental and numerical analysis in the fields of automotive and aircraft aerodynamics, high-velocity aerodynamics, and environmental and sports equipment aerodynamics. After studying aerospace engineering at the University of Stuttgart and receiving a doctorate from TUM (1993), Professor Adams was awarded a two-year postdoctoral fellowship at Stanford University and NASA Ames Research Center. In 1999 Professor Adams acquired his postdoctoral teaching qualification (habilitation) at ETH (Swiss Federal Technology Institute). He worked as an assistant professor at ETH until 2002 when he moved to TU Dresden as a professor of flow mechanics and magneto-fluid dynamics. Since 2004 Professor Adams has been a full professor in the Aerodynamics and Flow Mechanics Department at TUM. Professor Adams is the speaker of Collaborative Research Centre Transregio TRR 40. He is the author of a monograph on large eddy simulation and is the executive editor of the Journal of Computational Physics. |