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    Detached-Eddy Simulation of the Separated Flow Over a Rounded-Corner Square

    Source: Journal of Fluids Engineering:;2005:;volume( 127 ):;issue: 005::page 959
    Author:
    Kyle D. Squires
    ,
    James R. Forsythe
    ,
    Philippe R. Spalart
    DOI: 10.1115/1.1990202
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Detached-eddy simulation (DES) is used to study the massively separated flow over a rounded-corner square. The configuration is an idealization of the flow around a forebody cross section rotating at high angle of attack. Simulations are performed at sub- and supercritical Reynolds numbers, between which experimental measurements show a reversal of the side force. DES predictions are evaluated using experimental measurements and contrasted with unsteady Reynolds-averaged Navier–Stokes (URANS) results. The computations are also subjected to a moderate grid refinement, a doubling of the spanwise period, an enlargement of the domain in the other directions, and the removal of any explicit turbulence model. The sub- and supercritical flows are computed at Reynolds numbers of 105 and 8×105, respectively, and with the freestream at 10deg angle of attack. Boundary-layer separation characteristics (laminar or turbulent) are established via the initial and boundary conditions of the eddy viscosity. Following boundary layer detachment, a chaotic and three-dimensional wake rapidly develops. For the supercritical flow, the pressure distribution is close to the measured values and both the streamwise and side forces are in adequate agreement with measurements. For the subcritical flow, DES side-force predictions do not follow the experimental measurements far enough to achieve reversal.
    keyword(s): Force , Flow (Dynamics) , Separation (Technology) , Turbulence , Eddies (Fluid dynamics) , Simulation , Corners (Structural elements) , Boundary layers , Measurement , Pressure , Reynolds number AND Wakes ,
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      Detached-Eddy Simulation of the Separated Flow Over a Rounded-Corner Square

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    http://yetl.yabesh.ir/yetl1/handle/yetl/131962
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    • Journal of Fluids Engineering

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    contributor authorKyle D. Squires
    contributor authorJames R. Forsythe
    contributor authorPhilippe R. Spalart
    date accessioned2017-05-09T00:16:28Z
    date available2017-05-09T00:16:28Z
    date copyrightSeptember, 2005
    date issued2005
    identifier issn0098-2202
    identifier otherJFEGA4-27211#959_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/131962
    description abstractDetached-eddy simulation (DES) is used to study the massively separated flow over a rounded-corner square. The configuration is an idealization of the flow around a forebody cross section rotating at high angle of attack. Simulations are performed at sub- and supercritical Reynolds numbers, between which experimental measurements show a reversal of the side force. DES predictions are evaluated using experimental measurements and contrasted with unsteady Reynolds-averaged Navier–Stokes (URANS) results. The computations are also subjected to a moderate grid refinement, a doubling of the spanwise period, an enlargement of the domain in the other directions, and the removal of any explicit turbulence model. The sub- and supercritical flows are computed at Reynolds numbers of 105 and 8×105, respectively, and with the freestream at 10deg angle of attack. Boundary-layer separation characteristics (laminar or turbulent) are established via the initial and boundary conditions of the eddy viscosity. Following boundary layer detachment, a chaotic and three-dimensional wake rapidly develops. For the supercritical flow, the pressure distribution is close to the measured values and both the streamwise and side forces are in adequate agreement with measurements. For the subcritical flow, DES side-force predictions do not follow the experimental measurements far enough to achieve reversal.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDetached-Eddy Simulation of the Separated Flow Over a Rounded-Corner Square
    typeJournal Paper
    journal volume127
    journal issue5
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.1990202
    journal fristpage959
    journal lastpage966
    identifier eissn1528-901X
    keywordsForce
    keywordsFlow (Dynamics)
    keywordsSeparation (Technology)
    keywordsTurbulence
    keywordsEddies (Fluid dynamics)
    keywordsSimulation
    keywordsCorners (Structural elements)
    keywordsBoundary layers
    keywordsMeasurement
    keywordsPressure
    keywordsReynolds number AND Wakes
    treeJournal of Fluids Engineering:;2005:;volume( 127 ):;issue: 005
    contenttypeFulltext
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    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian