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    Rheology of Dilute Polymer Solutions and Engine Lubricants in High Deformation Rate Extensional Flows Produced by Bubble Collapse

    Source: Journal of Fluids Engineering:;2004:;volume( 126 ):;issue: 002::page 162
    Author:
    M. S. Barrow
    ,
    S. W. J. Brown
    ,
    S. Cordy
    ,
    P. R. Williams
    ,
    R. L. Williams
    DOI: 10.1115/1.1667889
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: We report a study of liquid jets formed by the collapse of bubbles under cavitation-generated pressure waves. Such jets involve an extensional flow which is characterized by high rates of extension, the latter being relevant to considerations of the flow of oils within dynamically loaded journal bearings. The technique reported here is found to be sensitive to the influence of extremely small concentrations of high molecular weight polymeric additive (xanthan gum). Commercial multigrade oils are also found to exhibit significantly larger resistance to extensional flow than their Newtonian counterparts and, insofar as the multigrade oils studied here are made viscoelastic by polymer additives, and possess significant levels of resistance to extension, the results provide evidence in support of a mitigating effect of viscoelasticity on cavitation, as mooted by Berker et al. [3].
    keyword(s): Pressure , Flow (Dynamics) , Deformation , Fluids , Viscosity , Engines , Electrical resistance , Bubbles , Jets , Polymers , Collapse , Petroleum , Polymer solutions , Cavitation , Viscoelasticity , Waves , Lubricants AND Rheology ,
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      Rheology of Dilute Polymer Solutions and Engine Lubricants in High Deformation Rate Extensional Flows Produced by Bubble Collapse

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/130260
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    • Journal of Fluids Engineering

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    contributor authorM. S. Barrow
    contributor authorS. W. J. Brown
    contributor authorS. Cordy
    contributor authorP. R. Williams
    contributor authorR. L. Williams
    date accessioned2017-05-09T00:13:28Z
    date available2017-05-09T00:13:28Z
    date copyrightMarch, 2004
    date issued2004
    identifier issn0098-2202
    identifier otherJFEGA4-27195#162_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/130260
    description abstractWe report a study of liquid jets formed by the collapse of bubbles under cavitation-generated pressure waves. Such jets involve an extensional flow which is characterized by high rates of extension, the latter being relevant to considerations of the flow of oils within dynamically loaded journal bearings. The technique reported here is found to be sensitive to the influence of extremely small concentrations of high molecular weight polymeric additive (xanthan gum). Commercial multigrade oils are also found to exhibit significantly larger resistance to extensional flow than their Newtonian counterparts and, insofar as the multigrade oils studied here are made viscoelastic by polymer additives, and possess significant levels of resistance to extension, the results provide evidence in support of a mitigating effect of viscoelasticity on cavitation, as mooted by Berker et al. [3].
    publisherThe American Society of Mechanical Engineers (ASME)
    titleRheology of Dilute Polymer Solutions and Engine Lubricants in High Deformation Rate Extensional Flows Produced by Bubble Collapse
    typeJournal Paper
    journal volume126
    journal issue2
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.1667889
    journal fristpage162
    journal lastpage169
    identifier eissn1528-901X
    keywordsPressure
    keywordsFlow (Dynamics)
    keywordsDeformation
    keywordsFluids
    keywordsViscosity
    keywordsEngines
    keywordsElectrical resistance
    keywordsBubbles
    keywordsJets
    keywordsPolymers
    keywordsCollapse
    keywordsPetroleum
    keywordsPolymer solutions
    keywordsCavitation
    keywordsViscoelasticity
    keywordsWaves
    keywordsLubricants AND Rheology
    treeJournal of Fluids Engineering:;2004:;volume( 126 ):;issue: 002
    contenttypeFulltext
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