Explosive behavior during binary-droplet impact on superheated substrates

Sen, Uddalok; Roy, Tamal; Ganguly, Ranjan; Angeloni, Louis A.; Schroeder, W. Andreas; Megaridis, Constantine M.

doi:10.1016/j.ijheatmasstransfer.2020.119658

Cited by 25 publications

(7 citation statements)

References 62 publications

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“…This droplet breakup or disintegration has been reported by a number of studies (Gayatri et al, 2015;Sen et al, 2020) and is usually termed as secondary atomization. The distance travelled by the sub-droplets generated by the disintegration of the original droplet is evaluated in addition to the velocity and angle, and would be discussed later.…”

Section: Resultsmentioning

confidence: 77%

“…Nonetheless, this explanation may be related to the behaviour of the neat liquids, and in the case of mixtures, most likely, the scenario would be different. This is shown by (Sen et al, 2020) for binary-watermixture droplet behaviour post-impact compared to the behaviour of neat water droplet. Fig 5 shows the effect of plate surface temperature on the temporal variation of the normalized droplet spread rate for neat diesel, DW10, DW20, and DW30 emulsion droplets respectively.…”

Section: Resultsmentioning

confidence: 91%

“…These include -but not limited to -rain drops, spray cooling, spray painting, inkjet printing, and fuel injection (Rueda Villegas et al, 2017). 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).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…While a detailed discussion on droplet and jet impact on wettability engineered surfaces is beyond the scope of this review, the reader could refer to pertinent works in the literature on a few salient attributes: (i) comprehensive review of droplet impact on solid surfaces of different wettabilities 230 and heated walls, 231 (ii) the role of wettability on impact dynamics, 232 (iii) transient heat transfer behavior during droplet impact on hydrophobic, superhydrophobic, and biphobic (hydrophobic spots in a superhydrophobic background) surfaces, 233 (iii) Leidenfrost behavior droplet impact regimes on wettability engineered surfaces, 234,235 (iv) self-propelled droplets on Leidenfrost surfaces, 236 (v) jet impingement on wettability engineered surfaces, 237 and (vi) heat transfer during jet impingement on wettability patterned surfaces. 233,238 The foregoing section discussed the feasibility of achieving a diverse range of complex microfluidic tasks on open surfaces.…”

Section: Fluidic Valving and Gatingmentioning

confidence: 99%

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

et al. 2022

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Effective manipulation of liquids on open surfaces without external energy input is indispensable for the advancement of point-of-care diagnostic devices. Open-surface microfluidics has the potential to benefit health care, especially in the developing world. This review highlights the prospects for harnessing capillary forces on surface-microfluidic platforms, chiefly by inducing smooth gradients or sharp steps of wettability on substrates, to elicit passive liquid transport and higher-order fluidic manipulations without off-the-chip energy sources. A broad spectrum of the recent progress in the emerging field of passive surface microfluidics is highlighted, and its promise for developing facile, low-cost, easy-to-operate microfluidic devices is discussed in light of recent applications, not only in the domain of biomedical microfluidics but also in the general areas of energy and water conservation.

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“…The impingement of a liquid jet on a solid substrate is relevant to a variety of application areas, including heat transfer from electronic devices, , internal cooling of turbine blades, , boiling heat transfer, − drying, ink-jet printing, and surface erosion . When the liquid jet hits an impermeable solid surface, it spreads out radially, forming a thin layer on the surface.…”

Section: Introductionmentioning

confidence: 99%

Jet Impact on Superhydrophobic Metal Mesh

et al. 2021

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Liquid-jet impact on porous, relatively thin solids has a variety of applications in heat transfer, filtration, liquid-fuel atomization, incontinence products, and solid-substrate erosion, among others. Many prior studies focused on liquid-jet impact on impermeable substrates, and some have investigated the hydraulic jump phenomenon. In the present work, the liquid jet strikes a superhydrophobic, permeable, metal mesh orthogonally, and the radial spreading and throughflow of the liquid are characterized. The prebreakthrough hydraulic jump, the breakthrough velocity, and the postbreakthrough spatial distributions of the liquid are investigated by varying the liquid properties (density, surface tension, and viscosity) and the openness of the metal mesh. The hydraulic jump radius in the prebreakthrough regime increases with jet velocity and is independent of the liquid properties and mesh geometry (pore size, wire diameter and pitch). The breakthrough velocity increases with surface tension of the liquid and decreases with the mesh opening diameter and liquid viscosity. A simple analytical model predicts the jet breakthrough velocity; its predictions are in accordance with the experimental observations. In the postbreakthrough regime, as the jet velocity increases, the liquid flow rate penetrating the mesh shows an initially steep increase, followed by a plateau, which is attributed to a Cassie–Baxter-to-Wenzel transition at the impact area of the mesh.

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Explosive behavior during binary-droplet impact on superheated substrates

Cited by 25 publications

References 62 publications

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

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

Patterning Wettability for Open-Surface Fluidic Manipulation: Fundamentals and Applications

Jet Impact on Superhydrophobic Metal Mesh

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