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Showing 1 to 13 of 13 for “"Bubble collapse"”.
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Free-Lagrange simulations of single cavitation bubble collapse.
… method has been applied to simulate the collapse of single cavitation bubbles near various boundary types. The simulations resemble an underwater explosion or laser- or spark-generated bubble, where the bubble evolution is driven by a high initial pressure difference between the bubble …
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Peak pressures due to steam bubble collapse-induced water hammer
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1979.
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On the Mechanics of Vapor Bubble Collapse - a Theoretical and Experimental Investigation
Made available in DSpace on 2014-12-09T17:13:31Z (GMT). No. of bitstreams: 1 6408376.pdf: 4465171 bytes, checksum: 8681c3dad1d7ab357e73cc660531f97b (MD5) Previous issue date: 1964
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The effect of noncondensible gas on steam bubble collapse induced water hammer
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
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AN EXPERIMENTAL AND NUMERICAL STUDY ON CAVITATION BUBBLE DYNAMICS AND ITS BIOMEDICAL APPLICATIONS
A thorough understanding of cavitation bubble dynamics is critical to mitigate cavitation damage or develop practical applications. An important field of study is the interaction of a single cavitation bubble with neighbouring structure(s). A cavitation bubble collapse near a finite elastic beam, …
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An experimental study on the collapse of an air-filled cylindrical cavity under dynamic loading
… the interactions of an air-filled cylindrical bubble immersed in hydrogel, a compliant boundary, and a transient loading wave. This combination is an analog of processes that occur in biomedical applications such as shockwave lithotripsy. No-boundary, rigid boundary, and two-boundary cases were …
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Detailed simulations of bubble-cluster dynamics
The violent collapse of bubble clusters can be an important mechanism of damage to adjacent material surfaces in both engineering and biomedical applications. Because of their complexity, past theoretical studies have generally been restricted to significantly simplified models, such as homogenized …
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The Effect of Static Pressure on the Inertial Cavitation Threshold and Collapse Strength
… pressure required to nucleate a gas and/or vapor bubble in a fluid, and to have that bubble undergo an inertial collapse, is termed the inertial cavitation threshold. The hydrostatic dependence of the inertial cavitation threshold was measured up to 30 MPa in ultrapure water using a high quality …
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Magma emplacement and deformation in rhyolitic dykes : insight into magmatic outgassing
… in the shallow-dyke permeability occurring via bubble collapse, and this is deemed to have been critical in dictating pressure within the deeper magma source region and fragmentation. Of further significance, it is also shown that shear deformation was localised during magma emplacement, with …
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Ultrasound-assisted synthesis and processing of carbon materials
… acoustic cavitation: the formation, growth, and collapse of bubbles in a liquid. Bubble collapse produces intense localized heating (~5000 K), high pressures (~300 atm), and enormous heating and cooling rates (>109 K/sec). In solid-liquid slurries, surface erosion and particle fracture occur due …
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Numerical Methods for Fluid-Solid Coupled Simulations: Robin Interface Conditions and Shock-Dominated Applications
… featuring shock waves, multiphase flow (e.g., bubbles), and shock-induced material damage and fracture. A recently developed three-dimensional computational framework is employed, which couples a multiphase, compressible CFD solver and a nonlinear finite element CSD solver using an embedded …
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Chemical and physical effects of ultrasound: sonoluminescence and materials
… cavitation (the formation, growth, and implosive collapse of bubbles in liquids irradiated with ultrasound) generally occurs. This is the phenomenon responsible for the driving of chemical reactions (sonochemistry) and the emission of light (sonoluminescence). The implosive collapse of bubbles in …
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Investigation of Multiphase Reactor Hydrodynamics Using Magnetic Resonance Imaging
… bed, and the gas and solid phases of an isolated bubble in a fluidised bed. The experimental vessels were: 52 mm in diameter using 5 mm glass spheres in the upflow bed at 8 bara, 27 mm with 5 mm glass spheres in the trickle bed at 6.75 bara, and 52 mm using 1.2 mm poppy seeds as the fluidised …