On the decay of the Lorentz-force-driven convection in vertical concentration stratification during magnetoelectrolysis

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• 作者：Xuegeng Yang ; Kerstin Eckert ; Sascha Mü ; hlenhoff ; Stefan Odenbach
• 关键词：MHD convection ; Copper electrolysis ; Concentration stratification ; Magnetoelectrolysis
• 刊名：Electrochimica Acta
• 出版年：2009
• 出版时间：30 November 2009
• 年：2009
• 卷：54
• 期：27
• 页码：7056-7065
• 全文大小：3025 K

文摘

We study the temporal development of the Lorentz-force-driven convection in an inhomogeneous magnetic field during copper electrolysis between two vertical electrodes. Using a combination of interferometry and particle image velocimetry we show that the Lorentz-force-driven convection is canceled out even after a moderate duration of the electrolysis. By reversing the current, a re-excitation of the convection is possible which is, however, restricted to a time window of some seconds. The reasons for the decay and re-appearance of the MHD flow are discussed and explained by scaling analysis.