Capillary wave
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Convection roll-driven generation of supra-wavelength periodic surface structures on dielectrics upon irradiation with femtosecond pulsed lasers Open
The significance of the magnitude of Prandtl number of a fluid in the propagation direction of induced convection rolls is elucidated. Specifically, we report on the physical mechanism to account for the formation and orientation of previo…
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Jet dynamics post drop impact on a deep pool Open
A liquid jet from drop impact on a liquid surface is one of the most iconic images of fluid mechanics. An experimental investigation shows that these jets can emerge with very different shapes and velocities, depending on whether the jet i…
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Coalescence of diffusively growing gas bubbles Open
Under slightly supersaturated conditions, bubbles need many minutes to grow due to the low gas diffusivity in liquids. When coalescence occurs, the fact that the bubbles have diffusively grown on top of a surface allows for control with pr…
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Experiments in Surface Gravity–Capillary Wave Turbulence Open
The last decade has seen a significant increase in the number of studies devoted to wave turbulence. Many deal with water waves, as modeling of ocean waves has historically motivated the development of weak turbulence theory, which address…
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Quasi-Periodic Standing Wave Solutions of Gravity-Capillary Water Waves Open
Chapter 1. Introduction and main result 1.1.Ideas of proof 1.2.Notation Chapter 2. Functional setting 2.1.Pseudo-differential operators and norms 2.2.D k0 -tame and D k0 -modulo-tame operators 2.3.Integral operators and Hilbert transform 2…
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On the origin of the circular hydraulic jump in a thin liquid film Open
This study explores the formation of circular thin-film hydraulic jumps caused by the normal impact of a jet on an infinite planar surface. For more than a century, it has been believed that all hydraulic jumps are created due to gravity. …
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Surface tension-driven self-alignment Open
Surface tension-driven self-alignment is a passive and highly-accurate positioning mechanism that can significantly simplify and enhance the construction of advanced microsystems. After years of research, demonstrations and developments, t…
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Capillary Interfacial Tension in Active Phase Separation Open
In passive fluid-fluid phase separation, a single interfacial tension sets both the capillary fluctuations of the interface and the rate of Ostwald ripening. We show that these phenomena are governed by two different tensions in active sys…
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Frequency-wavenumber spectrum of the free surface of shallow turbulent flows over a rough boundary Open
Data on the frequency-wavenumber spectra and dispersion relation of the dynamic water surface in an open channel flow are very scarce. In this work, new data on the frequency-wavenumber spectra were obtained in a rectangular laboratory flu…
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Non-equilibrium surface tension of the vapour-liquid interface of active Lennard-Jones particles Open
We study a three-dimensional system of self-propelled Brownian particles interacting via the Lennard-Jones potential. Using Brownian dynamics simulations in an elongated simulation box, we investigate the steady states of vapour-liquid pha…
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Necessity of capillary modes in a minimal model of nanoscale hydrophobic solvation Open
Significance Hydrophobic effects, which play a crucial role in many chemical and biological processes, originate in the statistics of microscopic density fluctuations in liquid water. Chandler has established the foundation for a simple an…
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Cavity optocapillaries Open
Droplets, particularly water, are abundant in nature and artificial systems. Thermal fluctuations imply that droplet interfaces behave like a stormy sea at the sub-nanometer scale.Thermal capillary-waves have been widely studied since 1908…
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Climbing droplets driven by mechanowetting on transverse waves Open
Mechanowetting drives droplets on (vertically) inclined surfaces through dynamic surface deformations.
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On the Kapitza instability and the generation of capillary waves Open
We revisit the classical problem of a liquid film falling along a vertical wall due to the action of gravity, i.e. the Kapitza paradigm (Kapitza, Zh. Eksp. Teor. Fiz. , vol. 18, 1948, pp. 3–28). The free surface of such a flow is typically…
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Frequency dispersion of small-amplitude capillary waves in viscous fluids Open
This work presents a detailed study of the dispersion of capillary waves with small amplitude in viscous fluids using an analytically derived solution to the initial value problem of a small-amplitude capillary wave as well as direct numer…
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Bubble production by air filament and cavity breakup in plunging breaking wave crests Open
Air filaments and cavities in plunging breaking waves, generically cylinders, produce bubbles through an interface instability. The effects of gravity, surface tension and surface curvature on cylinder breakup are explored. A generalized d…
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Interfacial phenomena in immiscible liquids subjected to vibrations in microgravity Open
We consider the response to periodic forcing between 5 Hz and 50 Hz of an interface separating immiscible fluids under the microgravity conditions of a parabolic flight. Two pairs of liquids with viscosity ratios differing by one order of …
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Experimental study of three-wave interactions among capillary-gravity surface waves Open
In propagating wave systems, three- or four-wave resonant interactions constitute a classical nonlinear mechanism exchanging energy between the different scales. Here we investigate three-wave interactions for gravity-capillary surface wav…
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Statistics of Jet Drop Production Open
Bubbles bursting at the ocean surface are an important source of sea‐spray aerosol. We describe jet drop production, from ensembles of high fidelity numerical simulations of bubble bursting, validated against experimental results. The numb…
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Global Regularity for 2d Water Waves with Surface Tension Open
We consider the full irrotational water waves system with surface tension and no gravity in dimension two (the capillary waves system), and prove global regularity and modified scattering for suitably small and localized perturbations of a…
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Nanoscale Structure of the Oil-Water Interface Open
X-ray reflectivity (XR) and atomistic molecular dynamics (MD) simulations, carried out to determine the structure of the oil-water interface, provide new insight into the simplest liquid-liquid interface. For several oils (hexane, dodecane…
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Solid–liquid interfacial free energy of ice Ih, ice Ic, and ice 0 within a mono-atomic model of water via the capillary wave method Open
We apply the capillary wave method, based on measurements of fluctuations in a ribbon-like interfacial geometry, to determine the solid–liquid interfacial free energy for both polytypes of ice I and the recently proposed ice 0 within a mon…
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Liquid Droplet Microresonators Open
We provide here an overview of passive optical micro-cavities made of droplets in the liquid phase. We focus on resonators that are naturally created and suspended under gravity thanks to interfacial forces, illustrating simple ways to exc…
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The Depth-Averaged Numerical Simulation of Laminar Thin-Film Flows With Capillary Waves Open
Thin-film flows encountered in engineering systems such as aero-engine bearing chambers often exhibit capillary waves and occur within a moderate to high Weber number range. Although the depth-averaged simulation of these thin-film flows i…
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Interfacial Properties of Active-Passive Polymer Mixtures Open
Active matter consists of particles that dissipate energy, from their own sources, in the form of mechanical work on their surroundings. Recent interest in active-passive polymer mixtures has been driven by their relevance in phase separat…
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Nanoscale thin-film flows with thermal fluctuations and slip Open
The combined effects of thermal fluctuations and liquid-solid slip on nanoscale thin-film flows are investigated using stochastic lubrication equations (SLEs). The previous no-slip SLE for films on plates is extended to consider slip effec…
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Observation of Thermal Equilibrium in Capillary Wave Turbulence Open
We investigate capillary wave turbulence at scales larger than the forcing one. At such scales, our measurements show that the surface waves dynamics is the one of a thermal equilibrium state in which the effective temperature is related t…
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Laser induced fluorescence studies on the distribution of surfactants during drop/interface coalescence Open
The spatiotemporal distribution of fluorescent surfactants on the merging interfaces during the coalescence of an aqueous drop with an organic/aqueous flat interface was studied experimentally with high-speed laser induced fluorescence. Th…
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Gravity–capillary waves in finite depth on flows of constant vorticity Open
This paper considers two-dimensional periodic gravity–capillary waves propagating steadily in finite depth on a linear shear current (constant vorticity). A perturbation series solution for steady periodic waves, accurate up to the third o…
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Comparison of free-surface and conservative Allen-Cahn phase-field lattice Boltzmann method Open
This study compares the free-surface lattice Boltzmann method (FSLBM) with the conservative Allen-Cahn phase-field lattice Boltzmann method (PFLBM) in their ability to model two-phase flows in which the behavior of the system is dominated …