The Flow Pattern in Single and Multiple Submerged Channels with Gas Evolution at the Electrodes

We show that the gas-liquid flow pattern in a single gas-evolving electrochemical channel can be remarkablydifferent from the flow pattern in multiple submerged gas-evolving electrochemical channels. This is due to the factthat in a single channel there is a higher accumulation of small bubbles and these can considerably affect the liquidvelocity pattern which in turn may affect the performance of a cell. Since experimental work is often carried out insingle channels, while industrial applications almost always involve multiple channels, this study provides insightinto the factors that affect the flow pattern in each situation and establishes the basis for relating the behavior ofsingle-and multiple-channel devices