Turbulent Diffusion from a Patchy Surface into the Boundary Layer

• MOURI Hideaki

  Meteorological Research Institute, Tsukuba

• HAGINOYA Shigenori

  Meteorological Research Institute, Tsukuba

• KURIHARA Kazuo

  Meteorological Research Institute, Tsukuba

• HORI Akihiro

  Meteorological and Environmental Service, Inc., Tama

• KAWASHIMA Yoshihide

  Meteorological and Environmental Service, Inc., Tama

Abstract

Turbulent diffusion from a small surface source into the boundary layer is studied by means of a wind-tunnel experiment. On the tunnel floor, a strip-shaped heater was placed perpendicularly to the mean flow. We regarded the heat as a passive scalar, and measured the air temperature in the boundary layer over the tunnel floor. The passive scalar, advected on the mean flow, diffuses in the floor-normal direction. For the diffusion of the passive scalar throughout the boundary layer, we find a characteristic length scale in the mean-flow direction. This length scale, which is always twice the boundary-layer thickness regardless of the other experimental parameters, would be usefu1 when we consider the at mospheric boundary layer over a patchy surface.

Journal

• Journal of the Meteorological Society of Japan. Ser. II

  Journal of the Meteorological Society of Japan. Ser. II 83 (3), 409-415, 2005

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390001206504966528
• NII Article ID: 110001817408
• NII Article ID: 130004434901
• NII Book ID: AA00702524
• DOI: 10.2151/jmsj.83.409
• ISSN: 21869057
• ISSN: 00261165
• NDL BIB ID: 7338202
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7338202
• Web Site: https://www.jstage.jst.go.jp/article/jmsj/83/3/83_3_409/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10612503
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
• Abstract License Flag: Disallowed