Pumping effect of heterogeneous meniscus formed around spherical particle

Nakamura, Hisakazu; Ogawa, Tetsuya; Inoue, Motochika; Hori, Takuma; Mu, Lizhong; Yoshikawa, Harunori; Zoueshtiagh, Farzam; Dietze, Georg F.; Tsukahara, Takahiro; Ueno, Ichiro

doi:10.1016/j.jcis.2019.12.005

Cited by 8 publications

(14 citation statements)

References 28 publications

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“…Such trends are similar to the results in the single-particle system 18 and can be explained by the correlation between the shape of the interface and pressure difference at the gas-liquid interface based on the Young-Laplace equation.…”

Section: Resultssupporting

confidence: 85%

“…This is similar to the single particle system. 18 An acceleration phenomenon similar to that around the first particle is observed around the second particle, and the M-CL velocity achieves max(U 2 ) immediately after the pressure difference ∆p (2) reaches the maximum value max(∆p 1 ) is greater than that of max(∆p (1) 1 ), which causes max(U 2 ) to be greater than max(U 1 ). Moreover, when the pressure difference ∆p (2) achieves the maximum value, max(∆p (2) 1 ), as indicated at (II), a pressure difference emerges again around the first particle, 11 and the second peak max(∆p…”

Section: Resultsmentioning

confidence: 79%

“…The inset displays a comparison of the M-CL angular position 8 φ CL around the first particle due to the difference in the distance between the particles L. Regardless of the value of L, after contact with the second particle, the value of φ CL increases and then converges around φ CL = 120 • , which is greater than the maximum value in the case of single particle system (around φ CL = 100 • ). 18 This higher position is realized owing to the meniscus bridge between the two particles. Moreover, at L = 75 and 100, φ CL decreases marginally and then increases immediately after the contact with the second particle.…”

Section: Resultsmentioning

confidence: 99%

“…In the simulation of the single particle system, the pressure difference inside the meniscus between the upstream and downstream sides has an important role in the acceleration phenomenon. 18 We also monitored the temporal variation of the pressure distribution in the meniscus around the particles during its formation process. As indicated in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…These acceleration phenomena are thought to be caused by the curvature of the meniscus formed around the spherical particles. Nakamura et al 18 numerically reproduced the acceleration phenomena in a single particle system and focused on the pressure distribution inside the meniscus formed around the particle. Consequently, the pressure difference between the upstream and downstream meniscus around the particle was found to be the main factor 3 driving the liquid as a 'pump'.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Meniscus Pump by Multiple Particles

et al. 2020

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Page 1 of 19 ACS Paragon Plus Environment LangmuirWe numerically investigate the behavior of a droplet spreading on a smooth substrate with multiple obstacles. As experimental works have indicated, the macroscopic contact line, or three-phase boundary line, of a droplet exhibits a significant deformation resulting in a local acceleration by successive interactions with an array of tiny obstacles settled on the substrate (Mu et al., Langmuir 35, 2019). We focus on the menisci formation and resultant pressure and velocity fields inside a liquid film in a two-spherical-particle system to realize an optimal design of the effective liquid transport phenomenon. Special attention is paid to the meniscus formation around the second particle, which influences the liquid supply related to the pressure difference around the first particle as a function of the distance between the two particles.

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Section: Resultssupporting

confidence: 85%