Liquid–gas flow patterns in a narrow electrochemical channel |
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| Authors: | A. Alexiadis,M.P. Dudukovic,P. Ramachandran,A. Cornell,J. Wanngå rd,A. Bokkers |
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| Affiliation: | aChemical Reaction Engineering Laboratory (CREL), Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Campus Box 1180, St. Louis, MO 63130, United States of America;bDepartment of Chemical Engineering and Technology, Applied Electrochemistry, Royal Institute of Technology, KTH, SE-100 44 Stockholm, Sweden;cEka Chemicals AB, SE-445 80 Bohus, Sweden;dAKZO Nobel Central Research BV, Velperweg 76, P.O. Box 9300, 6800 SB Arnhem, the Netherlands |
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| Abstract: | The flow in a narrow (3 mm wide) vertical gap of an electrochemical cell with gas evolution at one electrode is modeled by means of the two-phase Euler–Euler model. The results indicate that at certain conditions an unsteady type of flow with vortices and recirculation regions can occur. Such flow pattern has been observed experimentally, but not reported in previous modeling studies. Further analysis establishes that the presence of a sufficient amount of small (∼10 μm) bubbles is the main factor causing this type of flow at high current densities. |
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| Keywords: | Bubble Electrochemistry Fluid mechanics Laminar flow Mathematical modeling Multiphase flow |
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