Dynamic behavior of droplet transport on realistic gas diffusion layer with inertial effect via a unified lattice Boltzmann method

Yang, Jiapei; Fei, Linlin; Zhang, Xiaoqing; Ma, Xiao; Luo, Kai H.; Shuai, Shijin

doi:10.1016/j.ijhydene.2021.07.124

Cited by 10 publications

(3 citation statements)

References 63 publications

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“…In this work, the ULBM framework proposed by Luo et al (2021) is employed to solve the above governing equations. Since the introduction of the ULBM framework, it has been widely applied in simulating various multiphase flows (Yang et al 2021;Wang et al 2022b, and phase-change problems (Wang et al 2022a;Fei et al 2023). As a general framework covering different collision models, multiphase flow models and force schemes, it has inherent advantages in simulating multiphase flows coupled with multiple physical fields.…”

Section: The Ulbm Algorithm For the Governing Equationsmentioning

confidence: 99%

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Lattice Boltzmann modelling and study of droplet equatorial streaming in an electric field

Wang,

Lei,

Yang

et al. 2024

J. Fluid Mech.

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In 2017, Brosseau & Vlahovska (Phys. Rev. Lett, vol. 119, no. 3, 2017, p. 034501) found that, in a strong electric field, a weakly conductive, low-viscosity droplet immersed in a highly conductive, high-viscosity medium formed a lens shape, and liquid rings continuously detached from its equatorial plane and subsequently broke up into satellite droplets. This fascinating multiphase electrohydrodynamic (EHD) phenomenon is known as droplet equatorial streaming. In this paper, based on the unified lattice Boltzmann method framework proposed by Luo et al. (Phil. Trans. R. Soc. A Math. Phys. Engng Sci, vol. 379, no. 2208, 2021, p. 20200397), a novel lattice Boltzmann (LB) model is constructed for multiphase EHD by coupling the Allen–Cahn type of multiphase LB model and two new LB equations to solve the Poisson equation of the electric field and the conservation equation of the surface charge. Using the proposed LB model, we successfully reproduced, for the first time, the complete process of droplet equatorial streaming, including the continuous ejection and breakup of liquid rings on the equatorial plane. In addition, it is found that, under conditions of high electric field strength or significant electrical conductivity contrast, droplets exhibit fingering equatorial streaming that was unknown before. A power-law relationship is discovered for droplet total charge evolution and a theoretical model is then proposed to describe the droplet radius and height over time. The breakup of liquid rings is found to be dominated by capillary instability, while the breakup of liquid fingers is governed by the end-pinching mechanism. Finally, a phase diagram is constructed for fingering equatorial streaming and ring equatorial streaming, and a criterion equation is established for the phase boundary.

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Section: The Ulbm Algorithm For the Governing Equationsmentioning

confidence: 99%

“…Since the introduction of the ULBM framework, it has been widely applied in simulating various multiphase flows (Yang et al. 2021; Wang et al. 2022 b , 2023), and phase-change problems (Wang et al.…”

Section: Physical and Numerical Modelsmentioning

confidence: 99%

Lattice Boltzmann modelling and study of droplet equatorial streaming in an electric field

Wang,

Lei,

Yang

et al. 2024

J. Fluid Mech.

Self Cite

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show abstract

“…In most of the available studies on water droplet dynamics in channels [29,30], the bottom side of the channel is usually simplified as smooth wall to reveal the effects of some key parameters, such as channel shape, surface tension, and airflow velocity. Since two-dimensional models do not show the details of droplets in microchannels and differ from the actual working conditions, many studies now focus on 3D models [31,32]. Yang et al [33] investigated the effects of capillary pressures and contact angles of mixed wettability on the liquid water invasion process for GDLs with two Polytetra-fluoroethylene contents and found the distribution of liquid water saturation along the GDL plane direction becomes more non-uniform as the PTFE contact angle increases.…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann simulation of droplet coalescence in fuel cell flow channel with mechanical vibration

Zhai

Chen

2023

International Communications in Heat and Mass Transfer

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Effect of Waveform Gas Channel on Liquid Water Movement Emerging from GDL Pore with Lattice Boltzmann Method

Ashorynejad,

Javaherdeh,

Moslemi

2024

Iran J Sci Technol Trans Mech Eng

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Dynamic behavior of droplet transport on realistic gas diffusion layer with inertial effect via a unified lattice Boltzmann method

Cited by 10 publications

References 63 publications

Lattice Boltzmann modelling and study of droplet equatorial streaming in an electric field

Lattice Boltzmann modelling and study of droplet equatorial streaming in an electric field

Lattice Boltzmann simulation of droplet coalescence in fuel cell flow channel with mechanical vibration

Effect of Waveform Gas Channel on Liquid Water Movement Emerging from GDL Pore with Lattice Boltzmann Method

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