Dynamics of freely moving plates connected by a shallow liquid bridge

Gat, Amir D.; Navaz, Homayun K.; Gharib, Morteza

doi:10.1063/1.3643289

Cited by 9 publications

(7 citation statements)

References 18 publications

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“…Similar to its lateral DOFs, the axial dynamic response of an axisymmetric liquid bridge can be described by second‐order dynamical formalisms . Notably, the axial response of liquid joints was experimentally observed to morph from being controlled by capillarity to viscosity for increasing values of the capillary number, proportional to the frequency of perturbation .…”

Section: Structural Manipulation and Deployment: The Fluid Joint As Amentioning

confidence: 99%

The Fluid Joint: The Soft Spot of Micro‐ and Nanosystems

Mastrangeli

2015

Advanced Materials

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Fluid bridges are ubiquitous soft structures of finite size that conform to and link the surfaces of neighboring objects. Fluid joints, the specific type of fluid bridge with at least one extremity constrained laterally, display even more pronounced reactivity and self-restoration, which make them remarkably suited for assembly, actuation, and manipulation purposes. Their peculiar surface and bulk properties place fluid joints at the rich intersection of diverse scientific interests, and foster their widespread use throughout micro- and nanotechnology. A critical survey of the mechanics and of the manifold applications of fluid bridges and joints in micro- and nanosystems is presented here, along with current challenges and multidisciplinary perspectives.

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Section: Structural Manipulation and Deployment: The Fluid Joint As Amentioning

confidence: 99%

The Fluid Joint: The Soft Spot of Micro‐ and Nanosystems

Mastrangeli

2015

Advanced Materials

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“…For ε 2 → 0 and small Bond number ρgl 2 g /γ 1, the curvature at the liquid-gas interface is part of a circular arc and can be estimated from geometric relations as C ∼ 2 cos θ/(1 − D i + D i+1 ) (Gat, Navaz & Gharib 2011), where θ is the static (advancing or receding) wetting angle at the solid-liquid boundary. Thus, the pressure at the liquid-gas interface, denoted as Y l = L(X l , T) where L is the vertical location of the solid-liquid interface (see figure 1), is given by…”

Section: 2mentioning

confidence: 99%

Elasto-capillary coalescence of multiple parallel sheets

Gat

Gharib

2013

J. Fluid Mech.

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We analyse two-dimensional clamped parallel elastic sheets which are partially immersed in liquid as a model for elasto-capillary coalescence. In the existing literature this problem is studied via minimal energy analysis of capillary and elastic energies of the post-coalescence state, yielding the maximal stable post-coalescence bundle size. Utilizing modal stability analysis and asymptotic analysis, we studied the stability of the configuration before the coalescence occurred. Our analysis revealed previously unreported relations between viscous forces, body forces, and the instability yielding the coalescence, thus undermining a common assumption that coalescence will occur as long as it will not create a bundle larger than the maximal stable post-coalesced size. A mathematical description of the process creating the hierarchical coalescence structure was obtained and yielded that the mean number of sheets per coalesced region is limited to the subset 2 N where N is the set of natural numbers. Our theoretical results were illustrated by experiments and good agreement with the theoretical predictions was observed.

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“…As length decreases, these scale linearly [3] and hence decrease more slowly than body force and weight. Because of this, these two forces have been utilized in many small scale mechanical manipulators, such as self-assembly [6,7], actuation [8,9], lubrication [10][11][12][13], grasp and release [14,15]. A practical example is the liquid bridge [5,16,17] spanning the gap between two solid surfaces.…”

Section: Introductionmentioning

confidence: 99%

Exploiting air cushion effects to optimise a superhydrophobic/hydrophilic patterned liquid ring sealed air bearing

Wen¹,

Reddyhoff²,

Hu³

et al. 2020

Tribology International

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A thrust bearing consisting of an air cushion formed within a liquid ring has been developed, which takes advantage of the Laplace pressure induced by the liquid/air surface tension. As forces induced by Laplace pressure and surface tension scales down much more slowly than gravity and inertial forces, such a bearing has great potential when scaled down to the micro-scale. The liquid ring between the rotor and the stator of the bearing is anchored there by alternating hydrophilic and superhydrophobic patterns. An important discovery is that the performance of this bearing is greatly enhanced by the sealed cushion of air within the ring. This air cushion and thin liquid ring arrangement mean that the solid/solid contact of the bearing is replaced by solid/air and solid/liquid contact which significantly reduces the friction and wear. The factors which affects the performance of the bearing have been studied both experimentally and numerically providing results that can be used to optimise the design of this new type of bearing.

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Dynamics of freely moving plates connected by a shallow liquid bridge

Cited by 9 publications

References 18 publications

The Fluid Joint: The Soft Spot of Micro‐ and Nanosystems

The Fluid Joint: The Soft Spot of Micro‐ and Nanosystems

Elasto-capillary coalescence of multiple parallel sheets

Exploiting air cushion effects to optimise a superhydrophobic/hydrophilic patterned liquid ring sealed air bearing

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