Droplet Dynamics on a Wettability Patterned Surface during Spray Impact

Thomas, Tibin M.; Chowdhury, Imdad Uddin; Dhivyaraja, K.; Mahapatra, Pallab Sinha; Pattamatta, Arvind; Tiwari, Manish K.

doi:10.3390/pr9030555

Cited by 10 publications

(8 citation statements)

References 38 publications

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“…A wettability patterned surface (Figure 12i) can benefit from hydrophilicity and hydrophobicity, potentially improving spray cooling performance. Thomas et al 285 recently investigated droplet dynamics on such a patterned wettability surface during spray impact. Atmospheric Water Harvesting.…”

Section: ■ Applicationsmentioning

confidence: 99%

Fundamentals and Applications of Surface Wetting

Josyula,

Kumar Malla,

Thomas

et al. 2024

Langmuir

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In an era defined by an insatiable thirst for sustainable energy solutions, responsible water management, and cutting-edge lab-on-a-chip diagnostics, surface wettability plays a pivotal role in these fields. The seamless integration of fundamental research and the following demonstration of applications on these groundbreaking technologies hinges on manipulating fluid through surface wettability, significantly optimizing performance, enhancing efficiency, and advancing overall sustainability. This Review explores the behavior of liquids when they engage with engineered surfaces, delving into the farreaching implications of these interactions in various applications. Specifically, we explore surface wetting, dissecting it into three distinctive facets. First, we delve into the fundamental principles that underpin surface wetting. Next, we navigate the intricate liquid−surface interactions, unraveling the complex interplay of various fluid dynamics, as well as heat-and mass-transport mechanisms. Finally, we report on the practical realm, where we scrutinize the myriad applications of these principles in everyday processes and real-world scenarios.

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Section: ■ Applicationsmentioning

confidence: 99%

Fundamentals and Applications of Surface Wetting

Josyula,

Kumar Malla,

Thomas

et al. 2024

Langmuir

Self Cite

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show abstract

Section: Applicationsmentioning

confidence: 99%

“…A wettability patterned design for heat transfer applications using an array of spray nozzles was patented by Joshi and Dede. 295 Thomas et al 296 demonstrated the transport of liquid on a horizontal, wettability patterned metal surface upon high-speed spray impact (see schematic in Figure 22iv). The metal surface featured several superhydrophilic wedge tracks laid on a superhydrophobic background.…”

Section: Energy and Water Conservationmentioning

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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“…[ 23–33 ] However, these biphilic surfaces often involve complex geometries requiring precisely geometries design, multiple fabrication steps, and sophisticated equipment that make scaling up difficult and expensive. [ 34–37 ]…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Branched Siloxane Brushes for Efficient Harvesting of Atmospheric Water

Song

Liu

et al. 2023

Small

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Atmospheric water harvesting is considered a viable source of freshwater to alleviate water scarcity in an arid climate. Water condensation tends to be more efficient on superhydrophobic surfaces as the spontaneous coalescence‐induced droplet jumping on superhydrophobic surfaces enables faster condensate removal. However, poor water nucleation on these surfaces leads to meager water harvest. A conventional approach to the problem is to fabricate micro‐ and nanoscale biphilic structures. Nonetheless, the process is complex, expensive, and difficult to scale. Here, the authors present an inexpensive and scalable method based on manipulating the water‐repellent coatings of superhydrophobic surfaces. Flexible siloxane can facilitate water nucleation, while a branched structure promotes efficient droplet jumping. Moreover, ToF‐SIMS analysis indicated that branched siloxane provides a better water‐repellent coating coverage than linear siloxane and the siloxanes comprise hydrophilic and hydrophobic molecular segments. Thus, the as‐prepared superhydrophobic surface, TiO2 nanorods coated with branched siloxanes harvested eight times more water than a typical fluoroalkylsilane (FAS)‐coated surface under a low 30% relative humidity and performed better than most reported biphasic materials.

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Droplet Dynamics on a Wettability Patterned Surface during Spray Impact

Cited by 10 publications

References 38 publications

Fundamentals and Applications of Surface Wetting

Fundamentals and Applications of Surface Wetting

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

Hierarchically Branched Siloxane Brushes for Efficient Harvesting of Atmospheric Water

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