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    Sensitization of a Transition Sensitive Linear Eddy Viscosity Model to Rotation and Curvature Effects

    Source: Journal of Fluids Engineering:;2015:;volume( 137 ):;issue: 003::page 31207
    Author:
    Chitta, Varun
    ,
    Dhakal, Tej P.
    ,
    Keith Walters, D.
    DOI: 10.1115/1.4028627
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A new scalar eddyviscosity turbulence model is proposed, designed to exhibit physically correct responses to flow transition, streamline curvature, and system rotation effects. The eddyviscosity model (EVM) developed herein is based on the k–د‰ framework and employs four transport equations. The transport equation for a structural variable (v2) from a curvaturesensitive Shear Stress Transport (SST) k–د‰â€“v2 model, analogous to the transverse turbulent velocity scale, is added to the threeequation transitionsensitive k–kL–د‰ model. The physical effects of rotation and curvature (RC) enter the model through the added transport equation. The new model is implemented into a commercial computational fluid dynamics (CFD) solver and is tested on a number of flow problems involving flow transition and streamline curvature effects. The results obtained from the test cases presented here are compared with available experimental data and several other ReynoldsAveraged NavierStokes (RANS) based turbulence models. For the cases tested, the new model successfully resolves both flow transition and streamline curvature effects with reasonable engineering accuracy, for only a small increase in computational cost. The results suggest that the model has potential as a practical tool for the prediction of flow transition and curvature effects over blunt bodies.
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      Sensitization of a Transition Sensitive Linear Eddy Viscosity Model to Rotation and Curvature Effects

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    http://yetl.yabesh.ir/yetl1/handle/yetl/158214
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    contributor authorChitta, Varun
    contributor authorDhakal, Tej P.
    contributor authorKeith Walters, D.
    date accessioned2017-05-09T01:18:48Z
    date available2017-05-09T01:18:48Z
    date issued2015
    identifier issn0098-2202
    identifier otherfe_137_03_031207.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/158214
    description abstractA new scalar eddyviscosity turbulence model is proposed, designed to exhibit physically correct responses to flow transition, streamline curvature, and system rotation effects. The eddyviscosity model (EVM) developed herein is based on the k–د‰ framework and employs four transport equations. The transport equation for a structural variable (v2) from a curvaturesensitive Shear Stress Transport (SST) k–د‰â€“v2 model, analogous to the transverse turbulent velocity scale, is added to the threeequation transitionsensitive k–kL–د‰ model. The physical effects of rotation and curvature (RC) enter the model through the added transport equation. The new model is implemented into a commercial computational fluid dynamics (CFD) solver and is tested on a number of flow problems involving flow transition and streamline curvature effects. The results obtained from the test cases presented here are compared with available experimental data and several other ReynoldsAveraged NavierStokes (RANS) based turbulence models. For the cases tested, the new model successfully resolves both flow transition and streamline curvature effects with reasonable engineering accuracy, for only a small increase in computational cost. The results suggest that the model has potential as a practical tool for the prediction of flow transition and curvature effects over blunt bodies.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleSensitization of a Transition Sensitive Linear Eddy Viscosity Model to Rotation and Curvature Effects
    typeJournal Paper
    journal volume137
    journal issue3
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.4028627
    journal fristpage31207
    journal lastpage31207
    identifier eissn1528-901X
    treeJournal of Fluids Engineering:;2015:;volume( 137 ):;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
    yabeshDSpacePersian