Turbulent Diffusion from a Patchy Surface into the Boundary Layer

Access this Article

Search this Article

Author(s)

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 useful when we consider the atmospheric boundary layer over a patchy surface.

Journal

  • Journal of the Meteorological Society of Japan

    Journal of the Meteorological Society of Japan 83(3), 409-415, 2005-06-24

    Meteorogical Society of Japan

References:  16

Codes

  • NII Article ID (NAID)
    110001817408
  • NII NACSIS-CAT ID (NCID)
    AA00702524
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00261165
  • NDL Article ID
    7338202
  • NDL Source Classification
    ZM43(科学技術--地球科学--気象)
  • NDL Call No.
    Z54-J645
  • Data Source
    CJP  NDL  NII-ELS  NDL-Digital 
Page Top