| Description | Direct Numerical Simulations of turbulent reacting flows: How To.
Guillaume Blanquart, Ph.D.
Professor, Mechanical & Civil Engineering
California Institute of Technology ABSTRACT: Direct Numerical Simulations (DNS) is a well established tool to investigate fluid mechanics phenomena. By solving the governing equations directly, i.e. without using any modeling assumptions, one gains access to the fine details of the flow physics. This is especially important for turbulent reacting flows since the two-way interactions between chemistry and turbulence occur at the very small scales.
Unfortunately, these reacting DNS are extremely computationally expensive, even more so than incompressible DNS. In this work, I will review recent developments to accelerate these simulations without sacrificing the underlying physics. This includes: numerical methods to handle the stiff chemical source terms, the validity of simplified diffusion models, and the mathematical link between these DNS and laboratory experiments. Highly turbulent premixed flames will be used as examples. SPEAKER BIO: Professor Blanquart is a (full) professor in the department of Mechanical and Civil Engineering at the California Institute of Technology. He received his BS degree and a first MS in Applied Mathematics from the Ecole Polytechnique (France) in 2002; he received a second MS degree in Aeronautics and Astronautics in 2004 and his PhD in Mechanical Engineering from Stanford University in 2008; he joined Caltech in 2009 as an Assistant Professor. Prof. Blanquart's research interests range from chemical kinetics to turbulence theory and modeling with a particular focus on numerical methods. He received the NSF Career Award and the DoE Early Career Award in 2011. He now serves as the vice-chair for the Western States Section of the Combustion Institute, and is organizing the 2019 US National Combustion Meeting. |
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