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    Eddy Viscosity and Reynolds Stress Models of Entropy Generation in Turbulent Channel Flows

    Source: Journal of Fluids Engineering:;2017:;volume( 139 ):;issue: 003::page 34501
    Author:
    Sun, J.
    ,
    Kuhn, D.
    ,
    Naterer, G.
    DOI: 10.1115/1.4035138
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper presents new models of entropy production for incompressible turbulent channel flows. A turbulence model is formulated and analyzed with direct numerical simulation (DNS) data. A Reynolds-averaged Navier–Stokes (RANS) approach is used and applied to the turbulence closure of mean and fluctuating variables and entropy production. The expression of the mean entropy production in terms of other mean flow quantities is developed. This paper presents new models of entropy production by incorporating the eddy viscosity into the total shear stress. Also, the Reynolds shear stress is used as an alternative formulation. Solutions of the entropy transport equations are presented and discussed for both laminar and turbulent channel flows.
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      Eddy Viscosity and Reynolds Stress Models of Entropy Generation in Turbulent Channel Flows

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4233980
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    contributor authorSun, J.
    contributor authorKuhn, D.
    contributor authorNaterer, G.
    date accessioned2017-11-25T07:16:23Z
    date available2017-11-25T07:16:23Z
    date copyright2017/20/1
    date issued2017
    identifier issn0098-2202
    identifier otherfe_139_03_034501.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4233980
    description abstractThis paper presents new models of entropy production for incompressible turbulent channel flows. A turbulence model is formulated and analyzed with direct numerical simulation (DNS) data. A Reynolds-averaged Navier–Stokes (RANS) approach is used and applied to the turbulence closure of mean and fluctuating variables and entropy production. The expression of the mean entropy production in terms of other mean flow quantities is developed. This paper presents new models of entropy production by incorporating the eddy viscosity into the total shear stress. Also, the Reynolds shear stress is used as an alternative formulation. Solutions of the entropy transport equations are presented and discussed for both laminar and turbulent channel flows.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleEddy Viscosity and Reynolds Stress Models of Entropy Generation in Turbulent Channel Flows
    typeJournal Paper
    journal volume139
    journal issue3
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.4035138
    journal fristpage34501
    journal lastpage034501-6
    treeJournal of Fluids Engineering:;2017:;volume( 139 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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