Bubble dynamics atop an oscillating substrate: Interplay of compressibility and contact angle hysteresis

Fayzrakhmanova, Irina S.; Straube, Arthur V.; Shklyaev, Sergey

doi:10.1063/1.3650280

Cited by 29 publications

(5 citation statements)

References 25 publications

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“…contact line leading to the excitation of bubble surface modes. 14,29,30 The spherical and non-spherical radial oscillations of the bubble, coupled to the possible inhomogeneous adherence, could be responsible for the water inltration under the bubble (along the moving contact line for example). Small water pockets are thus created under the bubble (Fig.…”

Section: A Mechanism For Jumping Bubblesmentioning

confidence: 99%

Jumping acoustic bubbles on lipid bilayers

et al. 2015

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In the context of sonoporation, we use supported lipid bilayers as a model for biological membranes and investigate the interactions between the bilayer and microbubbles induced by ultrasound. Among the various types of damage caused by bubbles on the surface, our experiments exhibit a singular dynamic interaction process where bubbles are jumping on the bilayer, forming a necklace pattern of alteration on the membrane. This phenomenon was explored with different time and space resolutions and, based on our observations, we propose a model for a microbubble subjected to the combined action of van der Waals, acoustic and hydrodynamic forces. Describing the repeated jumps of the bubble, this model explains the lipid exchanges between the bubble and bilayer.

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Section: A Mechanism For Jumping Bubblesmentioning

confidence: 99%

Jumping acoustic bubbles on lipid bilayers

et al. 2015

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“…Typically, the implosion bubbles that we observed did not become as large as normal cavitation bubbles would be expected to become if they were nucleated under otherwise similar conditions. This is probably because growth is impeded by an additional dissipation channel: When implosion bubbles wet the solid with a three-phase contact angle between solid, liquid, and vapor, this dissipates energy through the contact angle hysteresis of the surface and pinning [46][47][48]. In Fig.…”

Section: Implosion Bubblesmentioning

confidence: 99%

Unorthodox bubbles when boiling in cold water

Parker

Granick

2014

Phys. Rev. E

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High-speed movies are taken when bubbles grow at gold surfaces heated spotwise with a near-infrared laser beam heating water below the boiling point (60-70 °C) with heating powers spanning the range from very low to so high that water fails to rewet the surface after bubbles detach. Roughly half the bubbles are conventional: They grow symmetrically through evaporation until buoyancy lifts them away. Others have unorthodox shapes and appear to contribute disproportionately to heat transfer efficiency: mushroom cloud shapes, violently explosive bubbles, and cavitation events, probably stimulated by a combination of superheating, convection, turbulence, and surface dewetting during the initial bubble growth. Moreover, bubbles often follow one another in complex sequences, often beginning with an unorthodox bubble that stirs the water, followed by several conventional bubbles. This large dataset is analyzed and discussed with emphasis on how explosive phenomena such as cavitation induce discrepancies from classical expectations about boiling.

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“…Notably, Shklyaev & Straube (2008) consider both the natural and forced oscillations of a hemispherical bubble with contact-line dynamics prescribed by the Hocking condition (Hocking 1987), which lead to non-trivial interactions between the volume and shape-change modes. Fayzrakhmanova, Straube & Shklyaev (2011) investigated the oscillations of a hemispherical sessile bubble subject to transverse substrate vibrations, focusing on the interplay of the compressibility of the bubble and the contact-angle hysteresis, which leads to stick-slip motions. Bubble oscillations can also be induced by other means, such as electrowetting (Ko, Lee & Kang 2009) or ultrasonic fields, as seen in experiment (Marin et al 2015;Volk & Kähler 2018) and theoretical works (Rallabandi, Wang & Hilgenfeldt 2014).…”

Section: Introductionmentioning

confidence: 99%

Oscillations of a partially wetting bubble

Ding

Bostwick

2022

J. Fluid Mech.

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We study the linear stability of a compressible sessile bubble in an ambient fluid that partially wets a planar solid support, where the gas is assumed to be an ideal gas that obeys the adiabatic law. The frequency spectrum is computed from an integrodifferential boundary value problem and depends upon the wetting conditions through the static contact angle $\alpha$ , the dimensionless equilibrium bubble pressure $\varPi$ , and the contact-line dynamics that we assume to be either (i) pinned or (ii) freely moving with fixed contact angle. Corresponding mode shapes are defined by the polar-azimuthal mode number pair $[k,\ell ]$ with $k+\ell =\mathbb {Z}^{+}_{even}$ . We report instabilities to the (i) $[0,0]$ breathing mode associated with volume change, and (ii) $[1,1]$ mode that is linked to horizontal centre-of-mass motion of the bubble. Stability diagrams and instability growth rates are computed, and the respective instability mechanisms are revealed through an energy analysis. The zonal $\ell =0$ modes are associated with volume change, and we show that there is a complex dependence between the classical volume and shape change modes for wetting conditions that differ from neutral wetting $\alpha =90^\circ$ . Finally, we show how the classical frequency degeneracy for the Rayleigh–Lamb modes of the free bubble splits for the azimuthal modes $\ell \neq 0,1$ .

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Bubble dynamics atop an oscillating substrate: Interplay of compressibility and contact angle hysteresis

Cited by 29 publications

References 25 publications

Jumping acoustic bubbles on lipid bilayers

Jumping acoustic bubbles on lipid bilayers

Unorthodox bubbles when boiling in cold water

Oscillations of a partially wetting bubble

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