Results 151 to 160 of about 233,135 (199)
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The Journal of the Acoustical Society of America, 1988
The standard approach to the analysis of the pulsations of a driven gas bubble is to assume that the pressure within the bubble follows a polytropic relation of the form p=p0(R0/R)3κ, where p is the pressure within the bubble, R is the radius, κ is the polytropic exponent, and the subscript zero indicates equilibrium values.
Andrea Prosperetti +2 more
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The standard approach to the analysis of the pulsations of a driven gas bubble is to assume that the pressure within the bubble follows a polytropic relation of the form p=p0(R0/R)3κ, where p is the pressure within the bubble, R is the radius, κ is the polytropic exponent, and the subscript zero indicates equilibrium values.
Andrea Prosperetti +2 more
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The Journal of the Acoustical Society of America, 1973
The principles underlying the dynamics of a bubble filled with condensable vapor in a thermally conducting liquid are set out and the equations governing the radial motion of a spherical bubble in an unbounded liquid at a fixed temperature are derived. A linearized solution of these equations is then found, assuming harmonic acoustic drive. It is shown
R. D. Finch, E. A. Neppiras
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The principles underlying the dynamics of a bubble filled with condensable vapor in a thermally conducting liquid are set out and the equations governing the radial motion of a spherical bubble in an unbounded liquid at a fixed temperature are derived. A linearized solution of these equations is then found, assuming harmonic acoustic drive. It is shown
R. D. Finch, E. A. Neppiras
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The Journal of the Acoustical Society of America, 2011
Bubbles generated between closely spaced parallel surfaces are approximately cylindrical. Here, cylindrical bubble dynamics are compared with those of spherical bubbles. In the linear approximation, the product of bubble radius and natural frequency of the monopole mode in water is ∼1m/s for a cylindrical bubble versus ∼3m/s for a spherical bubble ...
Yurii A. Ilinskii +3 more
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Bubbles generated between closely spaced parallel surfaces are approximately cylindrical. Here, cylindrical bubble dynamics are compared with those of spherical bubbles. In the linear approximation, the product of bubble radius and natural frequency of the monopole mode in water is ∼1m/s for a cylindrical bubble versus ∼3m/s for a spherical bubble ...
Yurii A. Ilinskii +3 more
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Bubble and bubble cloud dynamics
AIP Conference Proceedings, 2000Cavitation bubbles are formed from small air bubbles, so-called nuclei, with the surrounding pressure reduction caused by the flow, and then, the bubbles shrink and collapse with the surrounding pressure rise. Such volumetric changes of bubbles are calculated in detail and it is found that they are significantly influenced by the internal phenomena ...
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Communications in Nonlinear Science and Numerical Simulation, 2004
This work reviews the study of the symmetry approach in bubble dynamics and its applications to nonlinear acoustics. Point symmetries of the respective model equations are used to study the dynamics of single bubble pulsations, tethered bubbles and the distribution of coagulating bubbles.
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This work reviews the study of the symmetry approach in bubble dynamics and its applications to nonlinear acoustics. Point symmetries of the respective model equations are used to study the dynamics of single bubble pulsations, tethered bubbles and the distribution of coagulating bubbles.
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AIChE Journal, 1997
AbstractCoalescence of electrolytically‐generated, 50‐ to 600– μm‐diameter gas bubbles was observed using an optical technique that employs a linear photodiode array to detect interface movement with a resolution of 10−6s. When two bubbles coalesce, the surface energy that is released causes interface velocities of 2 to 4 m/s; these are followed by ...
Richard L. Stover +2 more
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AbstractCoalescence of electrolytically‐generated, 50‐ to 600– μm‐diameter gas bubbles was observed using an optical technique that employs a linear photodiode array to detect interface movement with a resolution of 10−6s. When two bubbles coalesce, the surface energy that is released causes interface velocities of 2 to 4 m/s; these are followed by ...
Richard L. Stover +2 more
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Multicomponent Gas Bubbles. II. Bubble Dynamics
Journal of Non-Equilibrium Thermodynamics, 1988La croissance des bulles de gaz ascendante dans une fonte de verre silicosodocalcique est analysee au moyen d'un modele a parametres localises qui tient compte de la tension superficielle. On suit la croissance du diametre des bulles en fonction de la temperature, de leur composition chimique et du transfert de ...
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Annual Review of Fluid Mechanics, 1997
▪ Abstract The inertia-dominated dynamics of a single gas or vapor bubble in an incompressible or nearly incompressible liquid has been the subject of intense investigation for many years. Studies prior to 1976 were thoroughly reviewed by Plesset & Prosperetti (1977) in Volume 9 of this series.
Z. C. Feng, L. G. Leal
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▪ Abstract The inertia-dominated dynamics of a single gas or vapor bubble in an incompressible or nearly incompressible liquid has been the subject of intense investigation for many years. Studies prior to 1976 were thoroughly reviewed by Plesset & Prosperetti (1977) in Volume 9 of this series.
Z. C. Feng, L. G. Leal
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Dynamics of two-dimensional bubbles
Physical Review E, 2015The dynamics of two-dimensional bubbles ascending under the influence of buoyant forces is numerically studied with a one-fluid model coupled with the front-tracking technique. The bubble dynamics are described by recording the position, shape, and orientation of the bubbles as functions of time.
Saúl, Piedra +2 more
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The Journal of the Acoustical Society of America, 2002
The study of a bubble encapsulated by a fluid or an elastic shell is a subject of interest for a wide variety of applications. In particular, ultrasound contrast agents are encapsulated bubbles 1–5 microns in radius developed for diagnostic imaging and, more recently, therapeutic purposes involving drug delivery.
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The study of a bubble encapsulated by a fluid or an elastic shell is a subject of interest for a wide variety of applications. In particular, ultrasound contrast agents are encapsulated bubbles 1–5 microns in radius developed for diagnostic imaging and, more recently, therapeutic purposes involving drug delivery.
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