Results 31 to 40 of about 830,855 (309)
Micromachines, 2022 Microjets caused by the cavitation effect in microchannels can affect the motion trajectory of solid particles in microchannels under ultrasonic conditions.
Mu Yuan +4 more
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Analytical expressions for primary Bjerknes force on inertial cavitation bubbles [PDF]
Phys. Rev. E 78, 036322 (2008) [9 pages], 2013 The primary Bjerknes force is responsible for the quick translational motion of radially oscillating bubbles in a sound field. The problem is classical in the case of small-amplitude oscillations, for which an analytical expression of the force can be easily obtained, and predicts attraction of sub- resonant bubbles by pressure antinodes.
arxiv +1 more source
A unified theory for bubble dynamics [PDF]
Physics of Fluids, 35, 2023, 033323, 2023 In this work, we established a novel theory for the dynamics of oscillating bubbles such as cavitation bubbles, underwater explosion bubbles, and air bubbles. For the first time, we proposed bubble dynamics equations that can simultaneously take into consideration the effects of boundaries, bubble interaction, ambient flow field, gravity, bubble ...
arxiv +1 more source
Numerical simulation of the backscattering of pressure waves from a bubble interface
Nihon Kikai Gakkai ronbunshu, 2015 The direct numerical simulations are conducted for the backscattering of incident pressure waves from a bubble with the ghost fluid method in order to understand the formation of secondary cavitation in the high intensity focused ultrasound (HIFU). It is
Moeko TANAKA +2 more
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Lateral Degassing Method for Disposable Film-Chip Microfluidic Devices
Membranes, 2021 It is critical to develop a fast and simple method to remove air bubbles inside microchannels for automated, reliable, and reproducible microfluidic devices.
Suhee Park +3 more
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Heliyon, 2022 This study investigates the effect of wall wettability on cavitation collapse based on a large-density-ratio lattice Boltzmann method (LBM) pseudo-potential model.
Qian Yang +3 more
doaj
Modelling large scale airgun-bubble dynamics with highly non-spherical features [PDF]
International Journal of Multiphase Flow (2020), 2020 A thorough understanding of the dynamics of meter-sized airgun-bubbles is very crucial to seabed geophysical exploration. In this study, we use the boundary integral method to investigate the highly non-spherical airgun-bubble dynamics and its corresponding pressure wave emission.
arxiv +1 more source
Luminescence from cavitation bubbles deformed in uniform pressure gradients [PDF]
Physical Review E 96(3) 033114 (2017), 2017 Presented here are observations that demonstrate how the deformation of millimetric cavitation bubbles by a uniform pressure gradient quenches single collapse luminescence. Our innovative measurement system captures a broad luminescence spectrum (wavelength range 300-900 nm) from the individual collapses of laser-induced bubbles in water.
arxiv +1 more source
Single cavitation bubble dynamics in a stagnation flow [PDF]
, 2023 Jetting of collapsing bubbles is a key aspect in cavitation-driven fluid-solid interactions as it shapes the bubble dynamics and additionally due to its direct interaction with the wall. We study experimentally and numerically the near-wall collapse and jetting of a single bubble seeded into the stagnation flow of a wall jet, i.e.
arxiv +1 more source
Journal of Fluid Science and Technology, 2010 A numerical prediction method of cavitation erosion is proposed. In this method, the analysis of bubbles in cavitating flows is performed and the intensity of cavitation erosion is evaluated by the impact pressure induced by spherical bubble collapse. In
Naoya OCHIAI +3 more
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