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DY: Fachverband Dynamik und Statistische Physik
DY 44: Droplets, Wetting, Complex Fluids, and Soft Matter (joint session DY/CPP)
DY 44.4: Vortrag
Freitag, 21. März 2025, 10:30–10:45, H47
Bubble Dynamics and Transport in Porous Structures: Insights from Mesoscale Simulations — •Qingguang Xie1, Othmane Aouane1, and Jens Harting1,2 — 1Forschungszentrum Jülich GmbH, Helmholtz-Institut Erlangen-Nürnberg (IET-2), Erlangen, Germany — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
Bubble formation, detachment, and transport within porous structures are critical phenomena in various applications, including electrolyzers and chemical reactors. We numerically investigate the dynamics of bubble growth and detachment at a catalytic surface using the lattice Boltzmann method. The departure radius of a bubble, growing with either a pinned or moving contact line, shows good agreement with theoretical predictions. Beyond detachment, we examine the subsequent transport of bubbles through a porous transport layer, systematically evaluating transport efficiency by considering factors such as pressure gradients, reaction rates, and pore wettability. Our findings provide valuable insights for optimizing the design of porous structures, potentially resulting in enhanced performance in electrolyzers and other gas-evolving devices.
Keywords: Bubble transport; Electrolyzers; Contact line; Porous structures; Bubble growth and detachment