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Vortex structures around a hemispheric hump

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Abstract

The vortex structure formed in front of and behind a hemispheric surface hump has been studied in a water recirculating flume. In the recirculation zone behind the hemisphere, arched vortex tubes were formed. Up to a certain critical Reynolds number, each tube was shed individually from the recirculation zone. However, when the Reynolds number exceeded a critical value, several of the tubes coalesced in the recirculation zone before shedding. In front of the hemisphere, some parabolic vortex tubes formed. Their number increased with Reynolds number below its critical value and decreased above this value. The dimensionless height of the parabolic vortex tube decreased with Reynolds number.

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Authors and Affiliations

  1. Department of Civil Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan

    Nobuyuki Tamai, Takashi Asaeda & Norio Tanaka

Authors
  1. Nobuyuki Tamai
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  2. Takashi Asaeda
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  3. Norio Tanaka
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Tamai, N., Asaeda, T. & Tanaka, N. Vortex structures around a hemispheric hump. Boundary-Layer Meteorol 39, 301–314 (1987). https://doi.org/10.1007/BF00116124

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  • DOI: https://doi.org/10.1007/BF00116124

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