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    Unsteady heat transfer from a sphere at low Reynolds and Strouhal numbers

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    Author
    Anderson, Clay Franklin
    Date
    1992
    Advisor
    Bayazitoglu, Yildiz
    Degree
    Master of Science
    Abstract
    Heat transfer from a sphere in a traveling sound wave is studied using an axi-symmetric formulation. The effect of a reversing flow on the flow behavior is examined and formation of separation regions and vortex shedding at flow reversal is found even for Reynolds numbers on the order of one. Time dependent thermal displacement and induced transient flows were found to increase the minimum value for transient heat transfer significantly above the conduction limit as predicted by a quasi-steady analysis. The heat transfer is found to decrease with Strouhal number for Reynolds numbers greater than two. Transient effects for the range of low Strouhal numbers are found to be significant for the determination of time-averaged unsteady heat transfer.
    Keyword
    Mechanical engineering
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892