Electrochemical simulations of mass transfer from isolated wet spots and droplets on realistic fluttering leaves |
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| Authors: | Monique Y Leclerc Peter H Schuepp George W Thurtell |
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| Institution: | (1) Department of Land Resource Science, Univ. of Guelph, Guelph, Ontario, Canada;(2) Department of Agricultural Physics and Chemistry, Macdonald College, McGill University, Ste. Anne de Bellevue, Quebec, Canada;(3) Department of Land Resource Science, Univ. of Guelph, Guelph, Ontario, Canada |
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| Abstract: | This paper reports on forced-convection mass transfer from isolated discs on rectangular plates as well as hemispheres on realistic fluttering leaves. An electrochemical method was used where the convective transfer of ions to the test electrode (the droplet or the wet spot) in an electrolytic flow system was measured as a function of flow rates, sizes of discs and hemispheres. Measurements showed that the local transfer coefficient for uniformly transferring plates varied as expected while the transfer from isolated discs on plates was much less a function of the distance from the leading edge. An expression to describe the transfer coefficient for an isolated disc as a function of distance from the leading edge was determined. An expression describing the transfer from hemispherical drops on fluttering leaves was derived and compared with the predictions from transfer theory for a sphere in free space. |
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