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Challenges in Turbulent Mixing with Combustion

Dimotakis, Paul E. (2002) Challenges in Turbulent Mixing with Combustion. In: IUTAM Symposium on Turbulent Mixing and Combustion. Fluid Mechanics and Its Applications. No.70. Springer , Dordrecht, pp. 95-112. ISBN 978-90-481-6074-7.

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Turbulent combustion combines the complexities of turbulence and mixing, challenges not met in the twentieth century, with the complexity and subtlety of chemical kinetics. This discussion focuses on progress and some turbulent-mixing issues in chemically reacting flows stemming from experimental, modeling, and direct-numerical simulation (DNS) studies. The mixing transition will be discussed. DNS studies of the Rayleigh-Taylor instability in miscible fluids reveal an early-time diffusive growth and a strong sensitivity to initial conditions. Recent experiments address the assumption of isotropy in turbulence and mixing. Experiments in high-speed shear layers elucidate some effects of compressibility on the mixed-fluid field. Issues involving molecular-transport coefficients will also be discussed.

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Additional Information:© 2002 Springer Science+Business Media Dordrecht. I would like to acknowledge discussions with A. Cook, S. J. Chapman, and T. Mattner on the Rayleigh-Taylor instability, with H. Wang on the sensitivity to molecular transport coefficients, and the on-going work on the effects of volume viscosity with H. Lam. This paper and the recent experimental and computational work discussed was supported by AFOSR grants F49620-98-1-0052, F49620-00-1-0036, and F49620-01-1-0006, and DOE contract W-7405-ENG-48, which are gratefully acknowledged. Finally, I would like to thank A. Pollard for his gracious invitation to attend and contribute to this Symposium.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)F49620-98-1-0052
Air Force Office of Scientific Research (AFOSR)F49620-00-1-0036
Air Force Office of Scientific Research (AFOSR)F49620-01-1-0006
Department of Energy (DOE)W-7405-ENG-48
Subject Keywords:Shear Layer; Direct Numerical Simulation; Turbulent Combustion; Scalar Dissipation Rate; Direct Numerical Simulation Result
Series Name:Fluid Mechanics and Its Applications
Issue or Number:70
Record Number:CaltechAUTHORS:20191009-111729565
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99190
Deposited By: Tony Diaz
Deposited On:09 Oct 2019 18:38
Last Modified:16 Nov 2021 17:44

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