Direct numerical simulation of a reacting turbulent mixing layer

Yuan Xuan, G. Blanquart

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In this work, Direct Numerical Simulations (DNS) have been performed on a n-heptane/air reacting mixing layer with detailed, finite-rate chemistry, to investigate primarily the interactions between aromatic chemistry and turbulent transport. Aromatic species are of critical importance for pollutant formation since their concentrations control directly the soot nucleation rates. The first objective of this DNS study is to provide an a posteriori validation of the previously-proposed reduced-order relaxation model for aromatic species [Xuan and Blanquart, Combust. Flame]. This model was designed for the chemistry tabulation of these species and their chemical source terms. The evolution of the chemical source terms and mass fractions of different aromatic species, from the DNS, will be compared to the model predictions. Results of this DNS will also provide a posteriori justification for different chemistry tabulation strategies for different categories of species. The Second objective of this DNS is to provide a database for the modeling of subgrid-scale scalar fluxes for Large-Eddy Simulations (LES). Various assumptions made by the commonly-used LES closure models in turbulent reacting flow simulations, for instance the dynamic smagorinsky model, will be examined.

    Original languageEnglish (US)
    Title of host publicationWestern States Section of the Combustion Institute Spring Technical Meeting 2014
    PublisherWestern States Section/Combustion Institute
    Pages327-333
    Number of pages7
    ISBN (Electronic)9781632665218
    StatePublished - 2014
    EventWestern States Section of the Combustion Institute Spring Technical Meeting 2014 - Pasadena, United States
    Duration: Mar 24 2014Mar 25 2014

    Other

    OtherWestern States Section of the Combustion Institute Spring Technical Meeting 2014
    CountryUnited States
    CityPasadena
    Period3/24/143/25/14

    Fingerprint

    turbulent mixing
    Direct numerical simulation
    direct numerical simulation
    chemistry
    tabulation
    Large eddy simulation
    large eddy simulation
    Soot
    reacting flow
    Flow simulation
    soot
    Heptane
    heptanes
    dynamic models
    Turbulent flow
    closures
    contaminants
    flames
    Dynamic models
    Nucleation

    All Science Journal Classification (ASJC) codes

    • Chemical Engineering(all)
    • Physical and Theoretical Chemistry
    • Mechanical Engineering

    Cite this

    Xuan, Y., & Blanquart, G. (2014). Direct numerical simulation of a reacting turbulent mixing layer. In Western States Section of the Combustion Institute Spring Technical Meeting 2014 (pp. 327-333). Western States Section/Combustion Institute.
    Xuan, Yuan ; Blanquart, G. / Direct numerical simulation of a reacting turbulent mixing layer. Western States Section of the Combustion Institute Spring Technical Meeting 2014. Western States Section/Combustion Institute, 2014. pp. 327-333
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    title = "Direct numerical simulation of a reacting turbulent mixing layer",
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    Xuan, Y & Blanquart, G 2014, Direct numerical simulation of a reacting turbulent mixing layer. in Western States Section of the Combustion Institute Spring Technical Meeting 2014. Western States Section/Combustion Institute, pp. 327-333, Western States Section of the Combustion Institute Spring Technical Meeting 2014, Pasadena, United States, 3/24/14.

    Direct numerical simulation of a reacting turbulent mixing layer. / Xuan, Yuan; Blanquart, G.

    Western States Section of the Combustion Institute Spring Technical Meeting 2014. Western States Section/Combustion Institute, 2014. p. 327-333.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    Xuan Y, Blanquart G. Direct numerical simulation of a reacting turbulent mixing layer. In Western States Section of the Combustion Institute Spring Technical Meeting 2014. Western States Section/Combustion Institute. 2014. p. 327-333