Analysis and prediction of the gas-liquid interfacial area for droplets impact on solid surfaces

Xie, Peng; Ding, Hongbing; Ingham, D.B.; Ma, Lin; Pourkashanian, Mohamed

doi:10.1016/j.applthermaleng.2020.115583

Cited by 16 publications

(6 citation statements)

References 65 publications

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“…2017; Liu, Zhang & Min 2019 a ; Xie et al. 2020). Because the forces exerted on various wettability surfaces are different, the use of heterogeneous surfaces can generate richer droplet motion forms, which include droplet splitting using a hydrophilic substrate decorated with hydrophobic patterns (Song et al.…”

Section: Introductionmentioning

confidence: 99%

“…One of the important factors affecting the dynamic behaviour of droplets is the surface wettability. Generally, droplets tend to adhere to hydrophilic surfaces and rebound from hydrophobic surfaces (Li et al 2017;Liu, Zhang & Min 2019a;Xie et al 2020). Because the forces exerted on various wettability surfaces are different, the use of heterogeneous surfaces can generate richer droplet motion forms, which include droplet splitting using a hydrophilic substrate decorated with hydrophobic patterns and achieving droplet rebound with deflection or gyration by adopting a hydrophobic substrate decorated with hydrophilic patterns (Li et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Lateral motion of a solid with a heterogeneous wettability surface driven by impacting droplets

Zhang

Wu²,

Lin³

2022

J. Fluid Mech.

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When a droplet impacts a solid with a heterogeneous wettability surface, the generated asymmetric forces can manipulate the droplet, and its counterforces can also actuate the solid in theory. In this study, a water droplet impacting a movable hydrophobic substrate, which is decorated with a hydrophilic stripe and restrained by two linear dampers, is studied numerically. After preliminarily checking the effects of the solid mass and damping coefficient of linear dampers, the dynamic mechanisms of solid motion are explored by analysing the variations in the lateral force and instantaneous displacement distance of the solid. After that, the effects of the impact parameters on the solid lateral motion are mainly investigated, including the initial droplet diameter, impact velocity and offset distance between the impact point and hydrophilic stripe. On this basis, the reciprocating solid motion under successive droplet impacts is studied, and periodic motion with different amplitudes can be realized under appropriate impact conditions. The obtained results can shed some fresh insight into the potential applications of droplet–solid interactions, which are valuable for the collection and utilization of energy from natural environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lateral motion of a solid with a heterogeneous wettability surface driven by impacting droplets

Zhang

Wu²,

Lin³

2022

J. Fluid Mech.

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“…In recent years, it's popular to develop VOF visual model to achieve SFB visualization [5]. Flow boiling visualization could be achieved by the software ANSYS 19.0, it is employed because liquid and vapor interface are tracked by the volume of fluid (VOF) model with piecewise linear interface calculation PLIC [6].…”

Section: Introductionmentioning

confidence: 99%

Visualization of subcooled flow boiling by simulation

Sun

Wang

2023

Second International Conference on Statistics, Applied Mathematics, and Computing Science (CSAMCS 2022)

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A two-dimensional visual simulation was conducted to study bubble behavior of R134a on the heating wall in subcooled flow boiling. It’s observed that bubble growth process experienced nucleation, sliding and departure on the heating wall at condition of heat flux of 300 kW/m2, velocity of 0.4 m/s, subcooling degree of 3 K and saturated temperature of 288.15 K. The results show that the bubble nucleated with large size at nucleation state, and the bubble size increased with sliding. This series of bubble behaviors was subjected to surface tension, buoyance, shear lift force and liquid inertial force. Besides, the temperature of R134a along radial direction varied linearly near the heating wall.

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“…Impacting liquid droplets on hydrophobic surfaces finds various applications in areas of heat transfer, coating, fire extinguishing, inkjet printing, fuel injection, metal quenching, self-cleaning, drug delivery, and so on [ 1 , 2 , 3 , 4 , 5 , 6 ]. As the texture and chemical properties of the impacting surfaces change, the dynamic characteristics of the droplet alter [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Nanowall Textured Hydrophobic Surfaces and Liquid Droplet Impact

et al. 2022

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Water droplet impact on nanowires/nanowalls’ textured hydrophobic silicon surfaces was examined by assessing the influence of texture on the droplet impact dynamics. Silicon wafer surfaces were treated, resulting in closely packed nanowire/nanowall textures with an average spacing and height of 130 nm and 10.45 μm, respectively. The top surfaces of the nanowires/nanowalls were hydrophobized through the deposition of functionalized silica nanoparticles, resulting in a droplet contact angle of 158° ± 2° with a hysteresis of 4° ± 1°. A high-speed camera was utilized to monitor the impacting droplets on hydrophobized nanowires/nanowalls’ textured surfaces. The nanowires/nanowalls texturing of the surface enhances the pinning of the droplet on the impacted surface and lowers the droplet spreading. The maximum spreading diameter of the impacting droplet on the hydrophobized nanowires/nanowalls surfaces becomes smaller than that of the hydrophobized as-received silicon, hydrophobized graphite, micro-grooved, and nano-springs surfaces. Penetration of the impacted droplet fluid into the nanowall-cell structures increases trapped air pressure in the cells, acting as an air cushion at the interface of the droplet fluid and nanowalls’ top surface. This lowers the droplet pinning and reduces the work of droplet volume deformation while enhancing the droplet rebound height.

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Analysis and prediction of the gas-liquid interfacial area for droplets impact on solid surfaces

Cited by 16 publications

References 65 publications

Lateral motion of a solid with a heterogeneous wettability surface driven by impacting droplets

Lateral motion of a solid with a heterogeneous wettability surface driven by impacting droplets

Visualization of subcooled flow boiling by simulation

Nanowall Textured Hydrophobic Surfaces and Liquid Droplet Impact

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