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    A Correlation for Nusselt Number of Slip Gas Flow in Confined Porous Media

    Source: Journal of Heat Transfer:;2020:;volume( 142 ):;issue: 009::page 092702-1
    Author:
    Tariq, Ammar
    ,
    Li, Peng
    ,
    Xu, Anyi
    ,
    Liu, Zhenyu
    DOI: 10.1115/1.4047514
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A clear understanding of flow and heat transfer at pore-scale level in microporous media is a topic of concern in microcooling/heating systems. In this work, a multiple-relaxation-time lattice Boltzmann method (LBM) is employed to study flow and heat transfer of gas in microporous media. Curved boundaries are treated using an effective boundary condition, which is formed by combining nonequilibrium extrapolation with counterextrapolation methods. The method also incorporates velocity slip and temperature jump on gas–solid interface. A two-dimensional (2D) porous domain composed of microcylinders, is considered from a representative element volume (REV) for the simulation. Porosity of the domain is variated by altering diameter of microcylinders. Nusselt number is calculated by varying Knudsen number (0.0–0.1), Reynolds number (5–50) and porosity (0.4–0.8). Based on the obtained numerical predictions, a new Nusselt number correlation is proposed for the first time in this work which can accurately predict the heat transfer for slip gas flow in confined porous media.
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      A Correlation for Nusselt Number of Slip Gas Flow in Confined Porous Media

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4274811
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    contributor authorTariq, Ammar
    contributor authorLi, Peng
    contributor authorXu, Anyi
    contributor authorLiu, Zhenyu
    date accessioned2022-02-04T22:04:12Z
    date available2022-02-04T22:04:12Z
    date copyright7/31/2020 12:00:00 AM
    date issued2020
    identifier issn0022-1481
    identifier otherht_142_10_102502.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4274811
    description abstractA clear understanding of flow and heat transfer at pore-scale level in microporous media is a topic of concern in microcooling/heating systems. In this work, a multiple-relaxation-time lattice Boltzmann method (LBM) is employed to study flow and heat transfer of gas in microporous media. Curved boundaries are treated using an effective boundary condition, which is formed by combining nonequilibrium extrapolation with counterextrapolation methods. The method also incorporates velocity slip and temperature jump on gas–solid interface. A two-dimensional (2D) porous domain composed of microcylinders, is considered from a representative element volume (REV) for the simulation. Porosity of the domain is variated by altering diameter of microcylinders. Nusselt number is calculated by varying Knudsen number (0.0–0.1), Reynolds number (5–50) and porosity (0.4–0.8). Based on the obtained numerical predictions, a new Nusselt number correlation is proposed for the first time in this work which can accurately predict the heat transfer for slip gas flow in confined porous media.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Correlation for Nusselt Number of Slip Gas Flow in Confined Porous Media
    typeJournal Paper
    journal volume142
    journal issue9
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4047514
    journal fristpage092702-1
    journal lastpage092702-10
    page10
    treeJournal of Heat Transfer:;2020:;volume( 142 ):;issue: 009
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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