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AEM Seminar: Simulation-based multi-physics predictions in XPACC — The Center for Exascale Simulation Plasma-coupled Combustion

Jonathan Freund, Professor, Aerospace Engineering, University of Illinois

2:30 PM on 2017-12-01


Plasmas offer unique and untapped potential for controlling turbulent combustion. Radicals produced in plasmas accelerate burning by short-circuiting standard chemical pathways; electric fields affect flame stability by accelerating charged chemical species within thin flame fronts; and plasma Joule heating affects both flow via thermal expansion and chemistry via temperature. Coupling them across all the important length and time scales to make quality predictions of plasma-coupled combustion demands the co-development of simulation models with tools to harness the heterogeneous architectures of anticipated exascale computing platforms. This current predictive science goal of XPACC is the laser-induced breakdown seeded ignition of a supersonic mixing flow, which is designed as a spring board toward scramjet configurations. The talk will give an overview of our in-progress efforts toward this goal, including our full-application and physics-targeted experiments, our approach toward quantifying prediction uncertainty, and our interoperable exascale simulations tools.

BIO:

Jonathan Freund is the Donald Biggar Willett Professor of Mechanical Science & Engineering and Aerospace at the University of Illinois at Urbana--Champaign. He is a Fellow of the American Physical Society, and a winner of the 2008 Frenkiel Prize from its Division of Fluid Dynamics where he currently serves as the division secretary/treasurer. He is an associate editor of Physical Review Fluids and on the editorial board of Annual Review of Fluid Mechanics. Computational science has been central to his research, which has included simulations of turbulent jet noise and its control, the dynamics of molecularly thin liquid films, nanostructure formation by ion-bombardment of semiconductor materials, and most recently the dynamics of red blood cells flowing in the narrow confines of the microcirculation. He co-directs XPACC, the DOE-funded Center for Exascale Simulation of Plasma-coupled Combustion at the University of Illinois.


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