Interferometric Study of Combined Forced and Natural Convection | Zendy

Frank McLar | Zendy; Rolf Müller | Zendy; Charles W. Tobias | Zendy

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Interferometric Study of Combined Forced and Natural Convection

Author(s) -

Frank McLar,

Rolf Müller,

Charles W. Tobias

Publication year - 1982

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1.2123475

Subject(s) - natural convection , forced convection , laminar flow , combined forced and natural convection , mass transfer , mechanics , convection , rayleigh number , leading edge , rayleigh–bénard convection , boundary layer , materials science , optics , chemistry , thermodynamics , physics

When a metal is electrodeposited in laminar flow onto a planar cathode facing upward in a channel, mass transfer rates are enhanced downstream beginning at some distance from the leading edge, because of the contribution of free convection to the fluid motion. The position and extent of this secondary flow has been clearly demonstrated by double beam interferometry, employed for the measurement of concentration profiles in the eathodic boundary laye:r. A narrow range of critical Rayleigh numbers, 1270 ~ 200, has been associated with the onset of natural convection. This result provides a convenient basis for the prediction of the transition from forced convection control to combined forced and natural convection control of the mass transfer process.

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