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- W2017132238 abstract "An analysis is made of the flow and thermal structures of a viscous fluid confined in a vertically mounted cylindrical container. The bottom endwall disk and the sidewall are rotating steadily about the cylinder axis, and the top endwall disk is stationary. A gravitationally stable temperature difference is applied on the container boundaries. In order to formulate a flow model of greater relevance to the Czochralski growth of crystals from melt, an axial suction through the rotating disk and a concomitant radial inflow through the sidewall are imposed. The main motivation of the study is to examine the effects of suction in a finite configuration and of the fluid stratification. Numerical solutions to the axisymmetric Navier-Stokes equations with the Boussinesq assumption have been obtained. The parameter ranges are that the rotational Reynolds number is large and the cylindrical aspect ratio, the Prandtl number, the suction parameter, and the stratification number are all of order unity. Comprehensive flow details have been acquired. For a stratified flow, the principal balance in the interior core is characterized by a relationship between the radial temperature gradient and the vertical shear in the azimuthal flow. The magnitudes of azimuthal flows in the core region increase as the suction increases. Significant differences are seen in the meridional flow patterns as the effects of suction and stratification are incorporated in the analysis. As the stratification effect becomes appreciable, larger portions of the meridional fluid transport are short-circuited directly from the sidewall to the rotating disk. The structure of the thermal field for a stratified fluid is plotted to illustrate the dominant modes of heat transfer. It is shown that the convective heat transfer associated with the meridional fluid transport is dominant in the main body of the flowfield." @default.
- W2017132238 created "2016-06-24" @default.
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- W2017132238 date "1989-04-01" @default.
- W2017132238 modified "2023-09-28" @default.
- W2017132238 title "Buoyant convection driven by an encapsuled spinning disk with axial suction" @default.
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- W2017132238 doi "https://doi.org/10.2514/3.147" @default.
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