Midwest Mechanics Seminar Series Mechanical Engineering Seminar
Tuesday, October 29, 2019 10:15 a.m.
3540 Engineering Building
Refreshments Served at 10:00 a.m.
Towards Exascale Simulation of Turbulent Combustion in Complex Flows Relevant to High-Efficiency Engines
Jacqueline H. Chen
Combustion Research Facility
Sandia National Laboratories
Direct numerical simulation (DNS) methodology and computing power have progressed to the point where it is feasible to perform DNS in mildly complex geometries representative of flow configurations encountered in practical combustors. These complex flows encompass effects of mean shear, flow recirculation, and wall boundary layers together with turbulent fluctuations which affect entrainment, mixing and combustion. Recent DNS studies with complex flows relevant to high efficiency low emissions gas turbine and internal combustion engines will be presented. Through application co-design with computer scientists a data centric asynchronous programming system has been used to refactor the DNS code, S3D, resulting in improved timeto-solution and overall performance on heterogeneous architectures. The programming system also provides more efficient and effective composition of in situ analytics and machine learning techniques.
Jacqueline H. Chen is a Senior Scientist at the Combustion Research Facility at Sandia National Laboratories. She has contributed broadly to research in turbulent combustion elucidating turbulence-chemistry interactions in combustion through direct numerical simulations. To achieve scalable performance of DNS on heterogeneous computer architectures she leads an interdisciplinary team of computer scientists, applied mathematicians and computational scientists to develop an exascale direct numerical simulation capability for turbulent combustion with complex chemistry and multi-physics. She is a member of the National Academy of Engineering and a Fellow of the Combustion Institute and the Americal Physical Society. She received the Combustion Institute’s Bernard Lewis Gold Medal Award in 2018 and the Society of Women Engineers Achievement Award in 2018.
Persons with disabilities have the right to request and receive reasonable accommodation. Please call the Department of Mechanical Engineering at 517-355-5131 at least one day prior to the seminar; requests received after this date will be met when possible.