Boundary Layer Resistance and Temperature Distribution on Still and Flapping Leaves | Zendy

JeanYves Parlange | Zendy; Paul E. Waggoner | Zendy

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Boundary Layer Resistance and Temperature Distribution on Still and Flapping Leaves

Author(s) -

JeanYves Parlange,

Paul E. Waggoner

Publication year - 1972

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.50.1.60

Subject(s) - boundary layer , laminar flow , turbulence , phragmites , natural convection , mechanics , flapping , resistance (ecology) , materials science , atmospheric sciences , botany , environmental science , convection , chemistry , physics , thermodynamics , biology , ecology , wetland , wing

The forced convection of heat from reed (Phragmites communis) leaves was observed in their natural environment. The leaves were painted with liquid crystals, which displayed or indicated their temperature without any interference with natural air flow. Temperature differences as large as 15 C were observed between the leading and trailing edges of the nontranspiring, painted leaves. The turbulence of the natural wind decreased the boundary layer resistance around the leaf to about 40% of the resistance in a laminar steady wind.

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