Boundary-Layer Meteorology

, Volume 2, Issue 3, pp 263–274

Studies of forced-convection heat and mass transfer of fluttering realistic leaf models

  • P. H. Schuepp

DOI: 10.1007/BF02184768

Cite this article as:
Schuepp, P.H. Boundary-Layer Meteorol (1972) 2: 263. doi:10.1007/BF02184768


The forced-convection mass transfer - and by analogy, heat transfer - of various realistic leaf models at Reynolds numbers 2 x 103<Re<4 x 104 was studied with an electrochemical method. The results are compared with similar measurements on plates and with transfer coefficients calculated from the laminar boundary-layer theory. In this way the validity of the commonly-used analytical expressions which represent the leaf by a rigid plate and neglect the effects of leaf curvature, fluttering, surface roughness and fluid turbulence, can be tested.

The measurements show that for fluttering single leaves, the convective mass-transfer coefficients must be expected to be higher by a factor of 1.4 ± 0.1 than the ones calculated for rigid plates of equal size and shape. For a leaf in a crop, the increase might be as high as a factor of 2. The high transfer coefficients measured for elements of cedar foliage are also discussed.

Copyright information

© D. Reidel Publishing Company 1972

Authors and Affiliations

  • P. H. Schuepp
    • 1
  1. 1.Macdonald College of McGill UniversityMontrealCanada

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