Abstract
AbstractThe limiting electrolysis current technique has been used to obtain experimental measurements of mass transfer in natural convection at rectangular plane plates. Inclinations varying from horizontal down facing to horizontal upfacing at intervals of 10° have been employed with plate height and electrolyte concentration as additional variables. For attached boundary layer flow conditions, all results are well correlated by the equation: Attached flow conditions are obtained for all downfacing inclined orientations the vertical position and for upfacing inclinations where θ (the angle from the vertical) is small. Separation of the flow occurs at higher values of θ in upfacing orientations and is demonstrated by Schlieren photography, as is the existence of longitudinal vortices in the flow. The critical Rayleigh number for separation instability is estimated from the mass transfer measurements and compared with results of other authors.
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