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    The Prediction of Two-Phase Turbulence and Phase Distribution Phenomena Using a Reynolds Stress Model

    Source: Journal of Fluids Engineering:;1990:;volume( 112 ):;issue: 001::page 107
    Author:
    M. Lopez de Bertodano
    ,
    S.-J. Lee
    ,
    R. T. Lahey
    ,
    D. A. Drew
    DOI: 10.1115/1.2909357
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The void fraction distribution for turbulent bubbly air/water upflows and downflows in a pipe was analyzed using a three-dimensional two-fluid model. A τ − ε (i.e., Reynolds stress) turbulence model was used for the continuous (liquid) phase. The τ − ε transport equations yield all components of the Reynolds stress tensor for the liquid phase momentum equations. The effect of these stresses is to create a lateral pressure gradient that acts on the bubbles and effects their distribution. The lateral lift force on the bubbles has also been modelled. This lift force arises due to the relative motion of the bubble with respect to a nonuniform liquid velocity field. It has been observed experimentally that for upflows the bubbles concentrate near the wall while for downflows they move toward the center of the conduit. The model presented herein predicts these trends.
    keyword(s): Turbulence , Stress , Bubbles , Lift (Fluid dynamics) , Equations , Porosity , Pressure gradient , Stress tensors , Water , Momentum , Fluids , Motion AND Pipes ,
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      The Prediction of Two-Phase Turbulence and Phase Distribution Phenomena Using a Reynolds Stress Model

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/107132
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    • Journal of Fluids Engineering

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    contributor authorM. Lopez de Bertodano
    contributor authorS.-J. Lee
    contributor authorR. T. Lahey
    contributor authorD. A. Drew
    date accessioned2017-05-08T23:33:01Z
    date available2017-05-08T23:33:01Z
    date copyrightMarch, 1990
    date issued1990
    identifier issn0098-2202
    identifier otherJFEGA4-27047#107_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/107132
    description abstractThe void fraction distribution for turbulent bubbly air/water upflows and downflows in a pipe was analyzed using a three-dimensional two-fluid model. A τ − ε (i.e., Reynolds stress) turbulence model was used for the continuous (liquid) phase. The τ − ε transport equations yield all components of the Reynolds stress tensor for the liquid phase momentum equations. The effect of these stresses is to create a lateral pressure gradient that acts on the bubbles and effects their distribution. The lateral lift force on the bubbles has also been modelled. This lift force arises due to the relative motion of the bubble with respect to a nonuniform liquid velocity field. It has been observed experimentally that for upflows the bubbles concentrate near the wall while for downflows they move toward the center of the conduit. The model presented herein predicts these trends.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Prediction of Two-Phase Turbulence and Phase Distribution Phenomena Using a Reynolds Stress Model
    typeJournal Paper
    journal volume112
    journal issue1
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.2909357
    journal fristpage107
    journal lastpage113
    identifier eissn1528-901X
    keywordsTurbulence
    keywordsStress
    keywordsBubbles
    keywordsLift (Fluid dynamics)
    keywordsEquations
    keywordsPorosity
    keywordsPressure gradient
    keywordsStress tensors
    keywordsWater
    keywordsMomentum
    keywordsFluids
    keywordsMotion AND Pipes
    treeJournal of Fluids Engineering:;1990:;volume( 112 ):;issue: 001
    contenttypeFulltext
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