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  • experimental study on radial temperature gradient effect of a taylor–couette flow with axial wall slits

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 804
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      the flow between two concentric cylinders with the inner cylinder rotating and an imposed radial temperature gradient was studied using a digital particle image velocimetry method. the flow transition process under both a positive and negative temperature gradient with four different models of a stationary outer cylinder without and with differing numbers of slits (6, 9 and 18) was studied. the results showed that the buoyant force due to the temperature gradient clearly generated a helical flow when the rotating reynolds number was small. for the plain and 6-slit models, the transition to a turbulent taylor vortex flow was not affected by the temperature gradient considered in this study. in addition, the transition process of a larger number of slits (9-, 18-slit models) was accelerated due to the slit wall. as the temperature gradient became larger, the critical reynolds number of the transition process decreased.

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