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    Air Entrainment in the Developing Flow Region of Plunging Jets—Part 2: Experimental

    Source: Journal of Fluids Engineering:;1997:;volume( 119 ):;issue: 003::page 603
    Author:
    P. D. Cummings
    ,
    H. Chanson
    DOI: 10.1115/1.2819287
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: When a water jet impinges a pool of water at rest, air bubbles may be entrained and carried away below the pool free surface: this process is called plunging jet entrainment. The study presents new experimental data obtained with a vertical supported jet. Distributions of air concentration and mean air-water velocity, and bubble chord length distributions measured in the developing shear layer are presented. The results indicate that the distributions of void fraction follow closely analytical solution of the diffusion equation. Further, the momentum shear layer and the air bubble diffusion layer do not coincide. Chord length data show a wide range of air bubble sizes and overall the experimental results suggest strong interactions between the entrained air bubbles and the momentum transfer mechanisms.
    keyword(s): Momentum , Flow (Dynamics) , Diffusion (Physics) , Shear (Mechanics) , Bubbles , Jets , Chords (Trusses) , Equations , Porosity , Water AND Mechanisms ,
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      Air Entrainment in the Developing Flow Region of Plunging Jets—Part 2: Experimental

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/118891
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    • Journal of Fluids Engineering

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    contributor authorP. D. Cummings
    contributor authorH. Chanson
    date accessioned2017-05-08T23:53:49Z
    date available2017-05-08T23:53:49Z
    date copyrightSeptember, 1997
    date issued1997
    identifier issn0098-2202
    identifier otherJFEGA4-27119#603_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/118891
    description abstractWhen a water jet impinges a pool of water at rest, air bubbles may be entrained and carried away below the pool free surface: this process is called plunging jet entrainment. The study presents new experimental data obtained with a vertical supported jet. Distributions of air concentration and mean air-water velocity, and bubble chord length distributions measured in the developing shear layer are presented. The results indicate that the distributions of void fraction follow closely analytical solution of the diffusion equation. Further, the momentum shear layer and the air bubble diffusion layer do not coincide. Chord length data show a wide range of air bubble sizes and overall the experimental results suggest strong interactions between the entrained air bubbles and the momentum transfer mechanisms.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAir Entrainment in the Developing Flow Region of Plunging Jets—Part 2: Experimental
    typeJournal Paper
    journal volume119
    journal issue3
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.2819287
    journal fristpage603
    journal lastpage608
    identifier eissn1528-901X
    keywordsMomentum
    keywordsFlow (Dynamics)
    keywordsDiffusion (Physics)
    keywordsShear (Mechanics)
    keywordsBubbles
    keywordsJets
    keywordsChords (Trusses)
    keywordsEquations
    keywordsPorosity
    keywordsWater AND Mechanisms
    treeJournal of Fluids Engineering:;1997:;volume( 119 ):;issue: 003
    contenttypeFulltext
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