Rayleigh-Benard Convection in an Electrochemical Redox Cell

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Science  28 Sep 1984:
Vol. 225, Issue 4669, pp. 1471-1473
DOI: 10.1126/science.225.4669.1471


Damped voltage oscillations occur when current steps are applied to a cell consisting of a thin layer of Fe111/Fe11 electrolyte sandwiched between horizontal, parallel, platinized platinum electrodes. The upper electrode must be the anode, and the magnitude of the current must be larger than a threshold value. The oscillations signal the onset of convection in the fluid. The experiment provides a new method for investigating transient convection processes.