PIV Study on Buoyant Bubble Flows in a Small Electrolytic Cell

Kuroda, Ichiro; Sakakibara, Akihiko; Sasaki, Tomohiro; Murai, Yuichi; Nagai, Niro; Yamamoto, Fujio

doi:10.3811/jjmf.22.161

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…61-64 Specifically, both techniques have been used to measure bubbles hemodynamics in electrolytic cells. 15,[65][66][67] PIV technique determines the velocity fields of a fluid using an optical, non-intrusive instantaneous measurement method. PIV measures gas bubbles data in gas-liquid system by injecting small tracer particles that ideally follow the continuous phase flow.…”

Section: Experimental Techniques To Measure Gas Bubbles Dynamicsmentioning

confidence: 99%

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Taqieddin

Nazari

Rajić

et al. 2017

J. Electrochem. Soc.

109

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Electrochemical systems suffer from poor management of evolving gas bubbles. Improved understanding of bubbles behavior helps to reduce overpotential, save energy and enhance the mass transfer during chemical reactions. This work investigates and reviews the gas bubbles hydrodynamics, behavior, and management in electrochemical cells. Although the rate of bubble growth over the electrode surface is well understood, there is no reliable prediction of bubbles break-off diameter from the electrode surface because of the complexity of bubbles motion near the electrode surface. Particle Image Velocimetry (PIV) and Laser Doppler Anemometry (LDA) are the most common experimental techniques to measure bubble dynamics. Although the PIV is faster than LDA, both techniques are considered expensive and time-consuming. This encourages adapting Computational Fluid Dynamics (CFD) methods as an alternative to study bubbles behavior. However, further development of CFD methods is required to include coalescence and break-up of bubbles for better understanding and accuracy. The disadvantages of CFD methods can be overcome by using hybrid methods. The behavior of bubbles in electrochemical systems is still a complex challenging topic which requires a better understanding of the gas bubbles hydrodynamics and their interactions with the electrode surface and bulk liquid, as well as between the bubbles itself.

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Section: Experimental Techniques To Measure Gas Bubbles Dynamicsmentioning

confidence: 99%

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Taqieddin

Nazari

Rajić

et al. 2017

J. Electrochem. Soc.

109

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show abstract

“…However, they encountered difficulties close to the electrode surface, where the largest void fraction occurs. In contrast, Kuroda et al (2008) used PIV on bubble shadow images to determine bubble velocities in an small-scale electrolysis cell with different electrode gaps. However, the liquid phase velocity could not be determined by this approach.…”

Section: Introductionmentioning

confidence: 98%

Near-wall measurements of the bubble- and Lorentz-force-driven convection at gas-evolving electrodes

et al. 2015

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“…Extensive experimental work has been done to study the electrochemically produced gas-bubbles by means of employing Particle Image Velocimetry and Laser Doppler Anemometry techniques. [10][11][12][13] These techniques, however, are limited to systems with either a single or small number of bubbles, or are restricted to investigating a single stage of the bubble life cycle, for example bubble growth dynamics, or bubble flow in two-phase system. [14][15][16] Alternatively, numerically modeling the behavior of bubbles from a multiscale, multi-physics viewpoint provides an opportunity to investigate the contributions of multiple physics phenomena simultaneously throughout the life cycle of a large number of bubbles.…”

mentioning

confidence: 99%

Editors' Choice—Critical Review—Mathematical Formulations of Electrochemically Gas-Evolving Systems

Taqieddin

Allshouse

2018

J. Electrochem. Soc.

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Electrochemically gas-evolving systems are utilized in alkaline water electrolysis, hydrogen production, and many other applications. To design and optimize these systems, high-fidelity models must account for electron-transfer, chemical reactions, thermodynamics, electrode porosity, and hydrodynamics as well as the interconnectedness of these phenomena. Further complicating these models is the production and presence of bubbles. Bubble nucleation naturally occurs due to the chemical reactions and impacts the reaction rate. Modeling bubble growth requires an accurate accounting of interfacial mass transfer. When the bubble becomes large, detachment occurs and the system is modeled as a two-phase flow where the bubbles can then impact material transport in the bulk. In this paper, we review the governing mathematical models of the physicochemical life cycle of a bubble in an electrolytic medium from a multiscale, multiphysics viewpoint. For each phase of the bubble life cycle, the prevailing mathematical formulations are reviewed and compared with particular attention paid to physicochemical processes and the impact the bubble. Through the review of a broad range of models, we provide a compilation of the current state of bubble modeling in electrochemically gas-evolving systems.

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PIV Study on Buoyant Bubble Flows in a Small Electrolytic Cell

Cited by 9 publications

References 16 publications

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Near-wall measurements of the bubble- and Lorentz-force-driven convection at gas-evolving electrodes

Editors' Choice—Critical Review—Mathematical Formulations of Electrochemically Gas-Evolving Systems

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