Dynamic wetting and heat transfer characteristics of a liquid droplet impinging on heated textured surfaces

Moon, Joo Hyun; Cho, Minhaeng; Lee, Seong Hyuk

doi:10.1016/j.ijheatmasstransfer.2016.02.041

Cited by 69 publications

(18 citation statements)

References 41 publications

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“…This viscosity decrease results to reduced kinetic energy dissipation and thus, faster recoiling behaviour. The difference in recoiling behaviour has already been observed in the experimental works of [26], [85], [86], where it is mentioned that the increased liquid viscosity at hydrophilic surfaces and low surface temperatures increases the viscous dissipation, which in turn reduce the available energy for retraction. Surface tension coefficient also decreases with temperature, but the effect of viscosity is more significant.…”

Section: Dynamic Behaviour Of Spreading In the Stick Regimementioning

confidence: 72%

Experimental Study of Diesel-Fuel Droplet Impact on a Similarly Sized Polished Spherical Heated Solid Particle

et al. 2017

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The head-to-head impact of diesel-fuel droplets on a polished spherical brass target has been investigated experimentally. High-speed imaging was employed to visualize the impact process for wall surface temperatures and Weber and Reynolds numbers in the ranges of 140-340 °C, 30-850, and 210-1135, respectively. The thermohydrodynamic outcome regimes occurring for the aforementioned ranges of parameters were mapped on a We-T diagram. Seven clearly distinguishable postimpact outcome regimes were identified, which are conventionally called the coating, splash, rebound, breakup-rebound, splash-breakup-coating, breakup-coating, and splash-breakup-rebound regimes. In addition, the effects of the Weber number and surface temperature on the wettability dynamics were examined; the temporal variations of the dynamic contact angle, dimensionless spreading diameter, and liquid film thickness forming on the solid particle were measured and are reported.

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Section: Dynamic Behaviour Of Spreading In the Stick Regimementioning

confidence: 72%

Experimental Study of Diesel-Fuel Droplet Impact on a Similarly Sized Polished Spherical Heated Solid Particle

et al. 2017

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“…The increased grooves space, p, could enhance this effect. Moreover, Moon et al [73] found that the dimple ST surface decreased maximum contact diameter of the impinged droplet; the changed liquid-solid interface area also increased the cooling effectiveness of processed surface in the case of total-wetting state. It can be concluded that the control of wetting state would be important in heat transfer of an impinging droplet on solid surface.…”

Section: Cutting Temperature Reductionmentioning

confidence: 99%

From macro to micro, evolution of surface structures on cutting tools: a review

Kang

Kim

et al. 2019

JMST Adv.

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In modern tool industry, the design and manufacture of cutting tool surface have been highlighted to fulfill the ever-increasing demands of advanced manufacturing, e.g., lean production, intelligent manufacturing and Industry 4.0. Chip-breaker is a triumph of applying the specific macro structure on rake face, not only contributing to chip controlling, but also being capable to reduce cutting force and tool temperature. In recent decade, surface texturing has been emerged on tool surface, indicating that research focus of surface structures on tools is evolving from macroscale to microscale. The present study reviews functions, optimization and manufacture approaches of different scale structures on cutting tools, aiming at providing a global view of related technologies and revealing the possible developing tendency in this field. This paper could greatly facilitate future research and industrial application of tool surface modification, especially for the integrated application in multi-scale.

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“…Besides, droplet response to its impact on a solid surface -in its own -grabs the interests as a complex hydrodynamic phenomenon (Sen et al, 2020). This interaction depends on the conditions of that surface, such as roughness (Chakaneh et al, 2019;Zhang et al, 2018), texture (Alizadeh et al, 2012;Moon et al, 2016;Qi & Weisensee, 2020;Wang et al, 2017), wettability (Li & Duan, 2019;Qi & Weisensee, 2020;Raman et al, 2016), and inclination (Jin et al, 2015(Jin et al, , 2016Li & Duan, 2019). Therefore, the droplet may spread, rebound, or splash away from the surface according to these physical conditions (Dunand et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Post-Impact Characteristics of a Diesel-in-Water Emulsion Droplet on a Flat Surface Below the Leidenfrost Temperature

Faik

Theeb

Zhang

2020

Int. J. Renew. Energy Dev.

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Droplet impingement on solid surfaces takes place in a variety of industrial and environmental applications. However, there are still some areas that are not fully comprehended; emulsion droplet impact on a heated surface is one of these areas that require further comprehension. Hence, the present work represents an experimental exploration for spread characteristics of diesel-in-water (DW) emulsion droplet impacting a heated flat plate. Three different emulsions in which water concentration is set to 10%, 20%, and 30% of the overall emulsion content by volume have been tested in addition to the neat diesel. The temperature of the flat plate is varied over the range 20, 40, 60, and 80ºC respectively. Magnified high speed direct imaging and shadowgraphy have been used simultaneously for tracking droplet spread over the heated surface post impact. Droplet spread rate, maximum diameter, rebound height and velocity represent the main evaluated parameters. The results show that the maximum spread diameter is proportional while spread rate is inversely proportional to the increase in plate temperature for all diesel concentrations including the neat diesel. Whereas, droplet rebound height and velocity are found to be more responsive to the variation in diesel concentration than the variation in plate temperature, so they are both minimum in the case of neat diesel and are increasing by the decrease of diesel concentration in the emulsions.

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Dynamic wetting and heat transfer characteristics of a liquid droplet impinging on heated textured surfaces

Cited by 69 publications

References 41 publications

Experimental Study of Diesel-Fuel Droplet Impact on a Similarly Sized Polished Spherical Heated Solid Particle

Experimental Study of Diesel-Fuel Droplet Impact on a Similarly Sized Polished Spherical Heated Solid Particle

From macro to micro, evolution of surface structures on cutting tools: a review

Post-Impact Characteristics of a Diesel-in-Water Emulsion Droplet on a Flat Surface Below the Leidenfrost Temperature

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