Boiling heat transfer on superhydrophilic, superhydrophobic, and superbiphilic surfaces

Betz, Amy Rachel; Jenkins, James R.; Kim, Chang‐Jin; Attinger, Daniel

doi:10.1016/j.ijheatmasstransfer.2012.10.080

Cited by 475 publications

(207 citation statements)

References 43 publications

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“…In Sec. IV, we investigate the bubble dynamics on chemically patterned surface, motivated by the large rate of heat transfer measured in a recent experiment [37]. We find that the stick-slip motion of contact line leads to a reduced departure diameter of bubbles, which is partly responsible for the enhanced rate of heat transfer.…”

Section: Introductionmentioning

confidence: 87%

Single-bubble dynamics in pool boiling of one-component fluids

Qian

2014

Phys. Rev. E

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We numerically investigate the pool boiling of one-component fluids with a focus on the effects of surface wettability on the single-bubble dynamics. We employed the dynamic van der Waals theory [Phys. Rev. E 75, 036304 (2007)], a diffuse-interface model for liquid-vapor flows involving liquid-vapor transition in nonuniform temperature fields. We first perform simulations for bubbles on homogeneous surfaces. We find that an increase in either the contact angle or the surface superheating can enhance the bubble spreading over the heating surface and increase the bubble departure diameter as well and therefore facilitate the transition into film boiling. We then examine the dynamics of bubbles on patterned surfaces, which incorporate the advantages of both hydrophobic and hydrophilic surfaces. The central hydrophobic region increases the thermodynamic probability of bubble nucleation while the surrounding hydrophilic region hinders the continuous bubble spreading by pinning the contact line at the hydrophobic-hydrophilic intersection. This leads to a small bubble departure diameter and therefore prevents the transition from nucleate boiling into film boiling. With the bubble nucleation probability increased and the bubble departure facilitated, the efficiency of heat transfer on such patterned surfaces is highly enhanced, as observed experimentally [Int. J. Heat Mass Transfer 57, 733 (2013)]. In addition, the stick-slip motion of contact line on patterned surfaces is demonstrated in one-component fluids, with the effect weakened by surface superheating.

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Section: Introductionmentioning

confidence: 87%

Single-bubble dynamics in pool boiling of one-component fluids

Qian

2014

Phys. Rev. E

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“…Furthermore, surface wettability can also influence the critical heat flux. [141,142] By introducing SHPL stripes, higher heat transfer performance is observed with more interlaced SHPL lines (Figure 7g), which can be used to improve the heat transfer efficiency in industrial boilers. [143] Another promising field over the past few decades is organic/inorganic hybrid devices, such as organic thin film transistor, organic solar cells, and sensors.…”

Section: Broad Applications Of Slpl Interfaces In Scientific Researchmentioning

confidence: 99%

Superlyophilic Interfaces and Their Applications

et al. 2017

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Superlyophilic interfaces denote interfaces displaying strong affinity to diverse liquids, including superhydrophilic, superoleophilic, and superamphiphilic interfaces. When coming in contact with these interfaces, water or oil droplets tend to spread completely with contact angles close to 0°, presenting versatile applications including self‐cleaning, antifogging, controllable liquid transport, liquid separation, and so forth. Inspired by nature, scientists have developed various kinds of artificial superlyophilic (SLPL) interfaces in the past decades. In terms of dimensional characteristics, the artificial SLPL interfaces can be divided into four categories: i) 0D particles, whose dispersibility or catalytic performance can be notably enhanced by superlyophilicity; ii) 1D micro‐/nanofibers or nanotubes/channels, which can efficiently transfer liquids with SLPL interfaces; iii) 2D flat SLPL interfaces, on which different functional molecules can be deposited uniformly, forming ultrathin and smooth films; and iv) 3D structures, which can be obtained by either constructing 0D, 1D, or 2D SLPL materials separately or directly fabricating random SLPL frameworks, and can always be used as functional coatings or bulk materials. Here, natural and artificial SLPL interfaces are briefly introduced, followed by a short discussion of the limit between lyophilicity and lyophobicity, and then a snapshot of methods to generate SLPL interfaces is given. Specific focus is placed on recent achievements of constructing SLPL interfaces from zero to three dimensions. Following that, broad applications of SLPL interfaces in commercial areas will be introduced. Finally, a short summary and outlook for future challenges in this field is presented.

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“…Biphilic surfaces [15][16][17] were fabricated on silicon wafers with a thermally grown oxide layer. Photolithography was used to mask the hydrophilic spots during a deposition of a self-assembled monolayer of Octadecyltrichlorosilane (OTS).…”

Section: Introductionmentioning

confidence: 99%

“…Previous research that investigated direct condensation followed by freezing was performed at surface temperatures varying from 253 K -268 K and relative humidities of 30 -60% [2-4, 6, 9, 10]. This research examines the effects that biphilic surfaces (surfaces which combine hydrophilic and hydrophobic regions) have on heterogeneous water nucleation, droplet growth, and freezing behavior.Biphilic surfaces [15][16][17] were fabricated on silicon wafers with a thermally grown oxide layer. Photolithography was used to mask the hydrophilic spots during a deposition of a self-assembled monolayer of Octadecyltrichlorosilane (OTS).…”

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confidence: 99%

Droplet coalescence and freezing on hydrophilic, hydrophobic, and biphilic surfaces

Dyke

Collard

Derby

et al. 2015

Applied Physics Letters

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Frost and ice formation can have severe negative consequences, such as aircraft safety and reliability. At atmospheric pressure, water heterogeneously condenses and then freezes at low temperatures. To alter this freezing process, this research examines the effects of biphilic surfaces (surfaces which combine hydrophilic and hydrophobic regions) on heterogeneous water nucleation, growth, and freezing. Silicon wafers were coated with a self-assembled monolayer and patterned to create biphilic surfaces. Samples were placed on a freezing stage in an environmental chamber at atmospheric pressure, at a temperature of 295 K, and relative humidities of 30%, 60%, and 75%. Biphilic surfaces had a significant effect on droplet dynamics and freezing behavior. The addition of biphilic patterns decreased the temperature required for freezing by 6 K. Biphilic surfaces also changed the size and number of droplets on a surface at freezing and delayed the time required for a surface to freeze. The main mechanism affecting freezing characteristics was the coalescence behavior.Keywords: Biphilic, droplet coalescence, freezing, frost On a cooled surface at atmospheric pressure, water first nucleates heterogeneously and subsequently, droplets may grow, coalesce, and freeze depending on the level of supercooling. Researchers have examined superhydrophobic [1-10], nano-engineered [7,11,12], and oil-impregnated surfaces [13,14] to prevent frost or freezing by delaying nucleation, increasing droplet mobility, and reducing droplet contact area with the surface. Most research reports the total surface freezing time delay. Previous research that investigated direct condensation followed by freezing was performed at surface temperatures varying from 253 K -268 K and relative humidities of 30 -60% [2-4, 6, 9, 10]. This research examines the effects that biphilic surfaces (surfaces which combine hydrophilic and hydrophobic regions) have on heterogeneous water nucleation, droplet growth, and freezing behavior.Biphilic surfaces [15][16][17] were fabricated on silicon wafers with a thermally grown oxide layer. Photolithography was used to mask the hydrophilic spots during a deposition of a self-assembled monolayer of Octadecyltrichlorosilane (OTS). The contact angle of the hydrophobic coating was measured to be 105°. Hydrophilic (Philic), hydrophobic (Phobic), and three types of biphilic surfaces (200IL, 200S, 25IL) were fabricated. The biphilic surfaces consisted of 25-μm-or 200-μm-hydrophilic circles on a hydrophobic background as shown in Figure 1. Before each experiment, the sample was cleaned with isopropyl alcohol and dried with nitrogen. After cleaning, the sample was placed on a freezing stage in an environmental chamber under quiescent flow conditions with a controlled air temperature (295 K) and relative humidity (RH). Each surface was tested at three relative humidities: 30%, 60%, and 75%. For each humidity and surface, the maximum freezing temperature was determined by incrementally decreasing the temperature of the freezing...

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Boiling heat transfer on superhydrophilic, superhydrophobic, and superbiphilic surfaces

Cited by 475 publications

References 43 publications

Single-bubble dynamics in pool boiling of one-component fluids

Single-bubble dynamics in pool boiling of one-component fluids

Superlyophilic Interfaces and Their Applications

Droplet coalescence and freezing on hydrophilic, hydrophobic, and biphilic surfaces

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