A computational fluid dynamics study of hydrogen bubbles in an electrochemical reactor

Abstract

Most electrochemical reactors present reactions with the growth and departure of gas bubbles which influence on the reactor hydrodynamics and this study is usually complex, representing a vast field for research. The present paper had as objective to study a bi-phase (gas-liquid) system aiming to foresee the influence of departure of hydrogen bubbles generated on effective electrode surface situated on cathodic semi-cell. Nevertheless, it was idealized that the gas was injected into the semi cell, through the effective electrode surface With this hypothesis, it was possible to study, and numerically analyze, the hydrodynamic behavior of the hydrogen bubbles in the interior

CFD Modeling of Gas-Liquid Bubbly Flow in Horizontal Pipes: Influence of Bubble Coalescence and Breakup

“…The MUSIG model has been implemented in the CFX-5.7 software to account nonuniform bubble size distribution in a gas-liquid mixture. The MUSIG model has been extensively used for different systems [7,10,15,16,43,44]. These size fractions provide a more accurate measure of the interfacial area density and therefore allow better calculation of the heat and mass transfer taking place between the continuous and dispersed phases.…”

Physics of Electrolytic Gas Evolution

“…Electrolytic gas evolution has been an interesting field for researchers and great progress has been achieved, but there are still challenging questions to be answered [83][84][85][86][87][88][89][90][91][92][93]. The majority of the studies have focused on miniature or micrometer-sized bubbles that are formed at the electrodes' surface and subsequently detach from it.…”

Effect of wearing a swimsuit on hydrodynamic drag of swimmer

“…The swimmer presented her arms extended above the head (shoulders flexed), with one hand above the other (streamlined position). The three-dimensional geometric models were used later for the analysis through the computational fluid dynamics simulation (Cavalcanti et al 2005). The swimmer was scanned in three situations: (i) wearing a standard swimsuit, with no legs; (ii) wearing a last generation swimsuit, with legs and; (iii) with no swimsuit, wearing light underwear (Fig.…”