Macroscale computations of shocked particle-laden flows rely on closure laws to model the heat transfer between the fluid and particle phases. Typically, closure models are semiempirical and obtained for a limited range of parameters because experiments can be difficult and expensive to perform. This paper describes an approach to obtain closures for heat and momentum exchanges from ensembles of high-fidelity mesoscale computations of shock–cylinder interactions. The simulations are performed for flow over a single cylinder for a wide range of Reynolds R e D and Mach numbers M s . The results are used to construct a metamodel for the drag coefficient C D and the Nusselt number N u correlation using a modified Bayesian kriging method. To study the effects of the particle volume fraction ϕ , mesoscale computations are performed for cylinder clusters and the N u and C D are calculated. The metamodel shows that, although the Nusselt number N u is primarily a function of the R e D , the M s and ϕ also significantly affect the interphase heat transfer. In particular, the Nusselt number N u first decreases until M s 1.5 1.8 and increases for values of M s > 1.8 . The results show that compressibility and viscous effects must be taken into account to provide accurate closure laws for interphase heat transfer in shocked particle-laden flows.


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    Titel :

    Metamodels for Interphase Heat Transfer from Mesoscale Simulations of Shock–Cylinder Interactions


    Beteiligte:
    Das, Pratik (Autor:in) / Sen, Oishik (Autor:in) / Jacobs, Gustaaf (Autor:in) / Udaykumar, H. S. (Autor:in)

    Erschienen in:

    AIAA Journal ; 56 , 10 ; 3975-3987


    Erscheinungsdatum :

    2018-09-13


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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