The final stable shape taken by a fluid–fluid interface when it experiences growing instability can be important in determining features as diverse weather patterns the atmosphere and oceans, growth of cell structures viruses, dynamics planets stars. An example which is accessible to laboratory study that an air bubble driven ultrasound becomes shape-unstable through parametric instability. Above critical driving pressure threshold for oscillations, minimal at resonance breathing mode,...

This paper reports on noninertial cavitation that occurs beyond the zone close to horn tip which inertial is confined. The characterized by collating data from a range of measurements bubbles trapped solid surface in this zone. Specifically, electrochemical measurement mass transfer an electrode compared with high-speed video bubble oscillation. gas shown be “noninertial” event erosion and “ring-down” experiments showing activity motion as sound excitation was terminated. These enable...

The subject of acoustic radiation pressure on a gas bubble is important in many applications because it controls how bubbles are moved by fields to target locations, and often they act upon the target. Previous theoretical treatments assume spherical undergoing linear pulsations, but some (such as cleaning using Faraday waves wall) require that be aspherical. Therefore, this paper derives ways calculate variation due non-spherical oscillations. magnitude direction force determined two...

Vapor bubble nucleation on a microrough surface wetted by volatile, incompressible liquid has been analyzed. The work of formation critical nucleus in cavity evaluated. Concave sites with negative curvature can decrease the height activation barrier for nucleus. average density evaluated whose (small) deviation from plane is specified Gaussian random function.

A passive acoustic method for detecting environmentally dangerous gas leaks from pipelines and methane naturally leaking the seabed has been investigated. Gas escape involves formation release of bubbles different sizes. Each bubble emits a sound at specific frequency. Determination radius frequency its signature emission by use so-called Minnaert formula restricted area applicability near seabed. The point is that inertial mass damping constant birthing are markedly those free bubble....

The acoustic remote sensing of subsea gas leakage traditionally uses sonars as active sensors and hydrophones picking up the sound generated by a leak passive sensors. When leaks occur underwater, bubbles are produced emit at frequencies intimately related to their sizes. experimental implementation an time-reversal mirror (TRM) is now well established in underwater acoustics. In basic TRM experiment, probe source emits pulse that received on array sensors, time reversed, re-emitted. After...

Acoustic scattering by a single bubble is the most basic problem for detection. For two-phase flow, subject of forced oscillations pair bubbles important because it controls how interact with each other. Attempts to incorporate interactions between have traditionally used multiple methodology. The proposed approach uses bi-spherical coordinate system and limited description sufficiently long-wave acoustical field, so that are homobaric, medium in vicinity can be considered incompressible....

The behavior of a single acoustically driven bubble tethered to wire ring is considered. method restraining the against rising by attaching it common procedure in conducting precision acoustic measurements. dynamics differs from those free due variation inertial (or added) mass. objective this study obtain closed-form, leading order solution for volume oscillations, assuming smallness radius R0 comparison with wavelength λ. It was shown, using invariance Laplace equation conformal...

The aim of this study is to describe the effect interface between media with different mechanical properties on behavior a gas bubble. presence boundary leads breaking degeneracy surface modes, which are perturbations spherically symmetric shape equilibrium splitting modes was determined by using perturbation and numerical techniques. results obtained can be applied elucidate physical mechanisms underlying new ultrasonic cleaning technique, ultrasonically activated stream. An experimental...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Alexey O. Maksimov, Timothy G. Leighton, Peter R. Birkin; Dynamics of a Tethered Bubble. AIP Conf. Proc. 30 May 2006; 838 (1): 512–515. https://doi.org/10.1063/1.2210407 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown Menu...