Dependence of the drag over superhydrophobic and liquid infused surfaces on the asperities of the substrate

García-Cartagena, Edgardo; Arenas, Isnardo; An, Jaehyeong; Leonardi, Stefano

doi:10.1103/physrevfluids.4.114604

Cited by 10 publications

(8 citation statements)

References 34 publications

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“…This is consistent with the recent analysis of García Cartagena et al. (2019). They have shown that, for a substrate made of randomly disposed pinnacles, the mean interface displacement scales roughly linearly with the distance among the points where the interface is pinned (this would be equivalent to the cavity width for a texture of regularly placed bars as considered herein).…”

Section: Effect Of the Interface Dynamicssupporting

confidence: 94%

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Heat transfer in a turbulent channel flow with super-hydrophobic or liquid-infused walls

Ciri¹,

Leonardi²

2020

J. Fluid Mech.

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Section: Effect Of the Interface Dynamicssupporting

confidence: 94%

“…In the present cases, the maximum displacement is wall unit for cavity widths , which is in close agreement with the magnitude reported by García Cartagena et al. (2019) for the same Reynolds and Weber numbers ( for widths of about wall units).…”

Section: Effect Of the Interface Dynamicssupporting

confidence: 93%

Heat transfer in a turbulent channel flow with super-hydrophobic or liquid-infused walls

Ciri¹,

Leonardi²

2020

J. Fluid Mech.

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“…These unique features potentially address the drawback of the superhydrophobic surface (e.g., depletion of air cushion). Benefiting from these excellent properties, LISs are used to exploit different functions in a wide range of fields, such as anti-biofouling [ 2 , 3 , 4 , 5 , 6 ], corrosion resistance [ 7 , 8 , 9 , 10 , 11 , 12 ], ice/frost delaying [ 13 , 14 , 15 , 16 , 17 ], self-cleaning [ 18 , 19 , 20 , 21 , 22 ], water harvesting [ 23 , 24 , 25 ], drag reduction [ 26 , 27 , 28 , 29 , 30 , 31 ], heat transfer [ 32 , 33 , 34 ]. Some recent works give an overview of LIS’s overall development ranging from fundamental fabrication to various applications [ 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation

Hao

2021

Nanomaterials

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The nepenthes-inspired lubricant-infused surface (LIS) is emerging as a novel repellent surface with self-healing, self-cleaning, pressure stability and ultra-slippery properties. Recently, stimuli-responsive materials to construct a smart LIS have broadened the application of LIS for droplet manipulation, showing great promise in microfluidics. This review mainly focuses on the recent developments towards the droplet manipulation on LIS with different mechanisms induced by various external stimuli, including thermo, light, electric, magnetism, and mechanical force. First, the droplet condition on LIS, determined by the properties of the droplet, the lubricant and substrate, is illustrated. Droplet manipulation via altering the droplet regime realized by different mechanisms, such as varying slipperiness, electrostatic force and wettability, is discussed. Moreover, some applications on droplet manipulation employed in various filed, including microreactors, microfluidics, etc., are also presented. Finally, a summary of this work and possible future research directions for the transport of droplets on smart LIS are outlined to promote the development of this field.

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“…Lubricant-infused surfaces (LIS), introduced in 2011, , have emerged as the leading innovation in functional surfaces . Inspired by the Nepenthes pitcher plant, these low-adhesive surfaces have attracted interest from many fields, including anti-biofouling, − anti-icing, − antidrag, − and condensation (for both refrigeration − and water collection − ) fields. Crucial to the function of these surfaces is the immobilized lubricant layer that provides them their desirable properties.…”

Section: Introductionmentioning

confidence: 99%

Depletion of the Lubricant from Lubricant-Infused Surfaces due to an Air/Water Interface

Peppou-Chapman

Neto

2021

Langmuir

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Lubricant-infused surfaces (LIS) have emerged as an innovative way to combat several modern challenges such as biofouling, ice formation and surface drag. The favourable properties of LIS are dependent on the presence and distribution of a lubricant layer coating the underlying substrate. Unfortunately, this layer is not stable indefinitely and will deplete due to external forces. Here, we study how an air/water interface depletes lubricant from LIS as a function of lubricant wettability on the substrate by varying the chemistry of both the lubricant and the substrate. The lubricants on the substrate deplete faster due to their dewetting into droplets. We also find that lubricants which spread onto the air/water interface are more susceptible to depletion. Finally, we investigate the effect of repeated immersions on the properties of liquid-like PDMS chains tethered to glass and find that dynamic contact angles on these surfaces remain constant over several dips and therefore their low hysteresis is unlikely due to unbound polymer.

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Dependence of the drag over superhydrophobic and liquid infused surfaces on the asperities of the substrate

Cited by 10 publications

References 34 publications

Heat transfer in a turbulent channel flow with super-hydrophobic or liquid-infused walls

Heat transfer in a turbulent channel flow with super-hydrophobic or liquid-infused walls

A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation

Depletion of the Lubricant from Lubricant-Infused Surfaces due to an Air/Water Interface

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