Buoyancy effect on forced convection in the leaf boundary layer

Kitano Masaharu, H. EGUCHI

研究成果: ジャーナルへの寄稿記事

11 引用 (Scopus)

抄録

Abstract. Mixed convection (forced convection plus free convection) in the leaf boundary layer was examined by air flow visualization and by evaluation of the boundary layer conductance at different leaf‐air temperature differences (TL‐TA) under low wind velocities. The visualized air flow was found to become more unstable and buoyant at higher TL‐TA. An ascending longitudinal plume was induced along the upper surface, and the air flow along the lower surface ascended after passing the trailing leaf edge. The air flow modified by buoyancy was considered to result in an increase in boundary layer conductance (GA) for mixed convection, which became higher with higher TL‐TA as compared with the conductance for pure forced convection without buoyancy. This increase in GA appeared larger at larger Grashof number (Gr) and at smaller Reynolds number (Re). The dependences of buoyancy effect on Gr and Re were related to ‘edge‐effects’.

元の言語英語
ページ(範囲)965-970
ページ数6
ジャーナルPlant, Cell & Environment
13
発行部数9
DOI
出版物ステータス出版済み - 1 1 1990

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Convection
air flow
Air
leaves
wind speed
convection
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

これを引用

Buoyancy effect on forced convection in the leaf boundary layer. / Masaharu, Kitano; EGUCHI, H.

:: Plant, Cell & Environment, 巻 13, 番号 9, 01.01.1990, p. 965-970.

研究成果: ジャーナルへの寄稿記事

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