Calendar of Events - Event
Event Scheduled for Nov 1, 2012
Event: ME Fall 2012 Seminar Series: 'Direct Numerical Simulation of Turbulence-Chemistry Interactions: Fundamental Insights Towards Predictive Models,' Dr. Jacqueline Chen, Sandia National Labs
Location: UTEB 476
Time: 01:30 pm
Details of Event:
Abstract: Recent petascale direct numerical simulation (DNS) of turbulent combustion have transformed our ability to interrogate fine-grained ‘turbulence-chemistry’ interactions in canonical laboratory configurations. In particular, three-dimensional DNS, at moderate Reynolds numbers and with complex chemistry, is providing resolved scalar and velocity statistics to understand fundamental coupling between turbulence, mixing and reaction. This information is leading to new physical insight and is providing unique validation data for assessing model assumptions in coarse-grained engineering CFD approaches used to design modern combustors. The role of petascale DNS is illustrated through selected examples relevant to fuel injection processes in stationary gas turbines for power generation, flashback in turbulent boundary layers, and lean premixed turbulent flame structure, propagation, and spectra. With the advent of 10-20 petaflop hybrid heterogeneous architectures in the next year it will be possible to increase the chemical complexity of DNS. Simulations will move beyond today’s studies of simple fuels—hydrogen, syngas and methane—to more complex, oxygenated alcohols.
Jacqueline H. Chen is a Distinguished Member of Technical Staff at the Combustion Research Facility at Sandia National Laboratories. She has contributed broadly to research in petascale direct numerical simulations (DNS) of turbulent combustion focusing on fundamental turbulence-chemistry interactions. These benchmark simulations provide fundamental insight into combustion processes and are used by the combustion modeling community to develop and validate turbulent combustion models for engineering CFD simulations. In collaboration with computer scientists and applied mathematicians she is the founding Director of the Center for Exascale Simulation of Combustion in Turbulence (ExaCT). She has co-designed exascale DNS algorithms together with exascale computer architectures including in-situ data mining and visualization. She received the DOE INCITE Award in 2005, 2007, 2008-2013 and the Asian American Engineer of the Year Award in 2009. She is a member of the DOE Advanced Scientific Computing Research Advisory Committee (ASCAC) and Subcommittees on Exascale Computing, and Big Data and Exascale. She is the editor of Flow, Turbulence and Combustion, was the co-editor of the Proceedings of the Combustion Institute, volumes 29 and 30, and is a member of the Board of Directors of the Combustion Institute.
Sponsored By: Mechanical Engineering
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