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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

NUMERICAL STUDY OF FLOW AND HEAT TRANSFER IN THE LIQUID IN A ROTATING VERTICAL CYLINDRICAL CONTAINER WITH A COOLED COUNTER-ROTATING DISC AT THE TOP

Get access (open in a dialog) DOI: 10.1615/IHTC9.2640
pages 339-344

Résumé

The combined forced and natural convection in the liquid in a heated rotating vertical cylindrical container with a cooled counter-rotating circular disc at the top is studied numerically for Prandtl numbers 0.068 and 7.0, and for various combinations of disc and container rotational Reynolds numbers, Res and Rec. When Gr/Res2 (or Gr/ Rec2) is small (<0.1), the forced flow due to the disc rotation (or the container rotation) is dominant over the natural convective flow; in some cases, when only the disc is rotated, a small separation bubble occurs near the axis of symmetry. When both Gr/ Res2 and Gr/ Rec2 are large (>10), the natural convective flow is dominant over the forced flow; in some cases, a local extremum in the azimuthal velocity occurs for Pr=0.068. The local Nusselt number at the disc and that at the side wall of the container depend strongly on the flow pattern in the liquid.