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Direct Numerical Simulation of High-Pressure Multispecies Turbulent Mixing in the Cold Ignition Regime

Masi, Enrica and Bellan, Josette and Harstad, Kenneth (2012) Direct Numerical Simulation of High-Pressure Multispecies Turbulent Mixing in the Cold Ignition Regime. In: 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2012-0351. ISBN 9781600869365. https://resolver.caltech.edu/CaltechAUTHORS:20190828-102318779

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Abstract

A model is proposed for describing mixing of several species under high pressure conditions that relies on a previously proposed model based on governing equations for multispecies mixing that has so far only been exercised for two-species mixing. For the two-species mixing simulations, transport properties were computed from correlated Schmidt (Sc) and Prandtl (Pr) numbers, accurately calculated as functions of the thermodynamic variables, and from a specified Reynolds number value from which an adjusted viscosity value was calculated so as to enable Direct Numerical Simulation (DNS). One of the novelties of the present study is the modeling and computation of multispecies mixing based on a full mass-diffusion matrix, a full thermal-diffusion-factor matrix necessary to include Soret and Dufour effects, and thermal conductivity computed for the species mixture. The scaling of the viscosity necessary for conducting DNS induces a scaling of the other transport properties that respects the accurate values of the Sc numbers and of the Pr number. Computations are performed with five species in the configuration of a temporal mixing layer and the effect of transport properties on species mixing and layer development are analyzed and discussed.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2012-351DOIArticle
ORCID:
AuthorORCID
Bellan, Josette0000-0001-9218-7017
Additional Information:© 2012 by California Institute of Technology. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2012-0351
DOI:10.2514/6.2012-351
Record Number:CaltechAUTHORS:20190828-102318779
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190828-102318779
Official Citation:Direct Numerical Simulation of High-Pressure Multispecies Turbulent Mixing in the Cold Ignition Regime Enrica Masi, Josette Bellan, and Kenneth Harstad 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. https://doi.org/10.2514/6.2012-351
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98310
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:28 Aug 2019 18:32
Last Modified:16 Nov 2021 17:38

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