An original method for measuring liquid surface tension from capillary bridges between two equal-sized spherical particles

Nguyen, Hien Nho Gia; Zhao, Chao-Fa; Millet, Olivier; Gagneux, Gérard

doi:10.1016/j.powtec.2019.12.049

Cited by 20 publications

(7 citation statements)

References 57 publications

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“…If the standard value γ lg 0.073 N.m ¡1 corresponds to pure water in air at 20 ¥ C [52], water is known to be a polar liquid that easily captures impurities from the external environment, inducing substantial reduction in surface tension. In this context, a calibration of the surface tension value in a capillary bridge between two grains was realized in [56] and shows that a value around 0.0693 N.m ¡1 can reasonably be adopted. When gravity is not accounted for, surface energy and capillary force are basically proportional to surface tension.…”

Section: Influence Of the Surface Tension Of The Liquid/gas Interfacementioning

confidence: 99%

“…Thus, the decrease in the surface tension has a twofold effect on the capillary force decrease. Figure 13 shows the capillary forces before and after coalescence for the classical value γ lg 0.073N.m ¡1 (Bo 2.14) and for the value from [56] γ lg 0.0693N.m ¡1 (Bo 2.26), with and without gravity, for θ 0 ¥ . The upper chart confirms that the dimensional capillary force decreases with gravity and decreasing surface tension.…”

Section: Influence Of the Surface Tension Of The Liquid/gas Interfacementioning

confidence: 99%

“…Investigating the influence of the physical parameters has pointed out that the vertical capillary force decreases with decreasing surface tension, increasing contact angle and addition of gravity. Consequently, accounting for gravity and using the more realistic value of the surface tension γ lg 0.0693 N.m ¡1 [56], we investigate on a plausible range of contact angle values compatible with the experimental data by El Korchi et al . In Figure 14, the capillary forces have been plotted for two different values of the contact angle, when adding gravity, and with γ lg 0.0693 N.m ¡1 .…”

Section: Calibration Of the Physical Parametersmentioning

confidence: 99%

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Numerical analysis of capillary bridges and coalescence in a triplet of spheres

et al. 2021

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The behavior of a natural soil is known to change substantially in presence of water under unsaturated conditions, due to additional capillary forces.Water can be absorbed by hygroscopic soil particles (such as clay), or remains at the surface of solid grains (sand, silt) and forms either a discontinuous (pendular regime) or a continuous phase (funicular regime), depending on the water content of the soil. Capillary bridges exist solely between pairs of grains at small water contents, giving rise to simple capillary force expressions and straightforward subsequent modeling. For larger water contents, these generic capillary bridges

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Section: Influence Of the Surface Tension Of The Liquid/gas Interfacementioning

confidence: 99%

Section: Influence Of the Surface Tension Of The Liquid/gas Interfacementioning

confidence: 99%

Section: Calibration Of the Physical Parametersmentioning

confidence: 99%

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Numerical analysis of capillary bridges and coalescence in a triplet of spheres

et al. 2021

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“…According to eq , the capillary force is related to the surface tension of solvent and contact angle, and is determined by the solvent nature . Therefore, different solvents were employed to investigate the effects of capillary force on shrinkage (Figure , parts a and b).…”

Section: Design and Characterizations Of Bwfementioning

confidence: 99%

Bamboo Weaving Inspired Design of a Carbonaceous Electrode with Exceptionally High Volumetric Capacity

Zhao

Zhang

et al. 2022

Nano Lett.

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A highly densified electrode material is desirable to achieve large volumetric capacity. However, pores acting as ion transport channels are critical for high utilization of active material. Achieving a balance between high volume density and pore utilization remains a challenge particularly for hollow materials. Herein, capillary force is employed to convert hollow fibers to a bamboo-weaving-like flexible electrode (BWFE), in which the shrinkage of hollow space results in high compactness of the electrode. The volume of the electrode can be decreased by 96% without sacrificing the gravimetric capacity. Importantly, the conductivity of BWFE after thermal treatment can reach up to 50,500 S/m which exceeds that for most other carbon materials. Detailed mechanical analysis reveals that, due to the strong interaction between nanoribbons, Young’s modulus of the electrode increases by 105 times. After SnO2 active materials is impregnated, the BWFE/SnO2 electrode exhibits an exceptionally ultrahigh volumetric capacity of 2000 mAh/cm3.

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“…To predict the profile of a liquid bridge between two spherical particles, Wang et al [ 18 ] proposed an asymptotic solution method based on a rapid convergent predictor–corrector algorithm, in which the minimal surface ensures the minimum total surface energy. Nguyen et al [ 19 ] investigated an original approach for measuring surface tension from two equal-sized spherical particles. The meniscus profile of the capillary bridge was recorded using a high-resolution camera to calculate the capillary force.…”

Section: Introductionmentioning

confidence: 99%

Capillary Forces between Concave Gripper and Spherical Particle for Micro-Objects Gripping

et al. 2021

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The capillary action between two solid surfaces has drawn significant attention in micro-objects manipulation. The axisymmetric capillary bridges and capillary forces between a spherical concave gripper and a spherical particle are investigated in the present study. A numerical procedure based on a shooting method, which consists of double iterative loops, was employed to obtain the capillary bridge profile and bring the capillary force subject to a constant volume condition. Capillary bridge rupture was characterized using the parameters of the neck radius, pressure difference, half-filling angle, and capillary force. The effects of various parameters, such as the contact angle of the spherical concave gripper, the radius ratio, and the liquid bridge volume on the dimensionless capillary force, are discussed. The results show that the radius ratio has a significant influence on the dimensionless capillary force for the dimensionless liquid bridge volumes of 0.01, 0.05, and 0.1 when the radius ratio value is smaller than 10. The effectiveness of the theorical approach was verified using simulation model and experiments.

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An original method for measuring liquid surface tension from capillary bridges between two equal-sized spherical particles

Cited by 20 publications

References 57 publications

Numerical analysis of capillary bridges and coalescence in a triplet of spheres

Numerical analysis of capillary bridges and coalescence in a triplet of spheres

Bamboo Weaving Inspired Design of a Carbonaceous Electrode with Exceptionally High Volumetric Capacity

Capillary Forces between Concave Gripper and Spherical Particle for Micro-Objects Gripping

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