Dynamics of single cavitation bubble collapse jet under particle-wall synergy

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(10)

Published: Oct. 1, 2024

The interaction between a particle and cavitation bubble significantly influences the erosive effect on wall surface of flow passage components in fluid machinery. This paper investigates dynamics single collapse jet under synergetic effects wall, using Kelvin impulse theory high-speed photographic experiments. A theoretical model to predict intensity direction at arbitrary locations near is constructed basis image method Weiss's theorem. accuracy verified by comparison with large number experimental results. mechanisms underlying relative contributions behavior are explored. key parameters also quantitatively analyzed, including positions particle, dimensionless radius. main conclusions as follows: (1) will cause deflection leading formation attraction zone. proposed effectively predicts spatial location this (2) There exists region which weak, there equilibrium point zero wall. position gradually approaches nonlinear manner increasing size quasi-linear decreasing particle–wall distance. (3) When same distance from changes toward vertical bubble–particle increases. Moreover, effective range particle's influence decreases decreases.

Language: Английский

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Investigation on the effects of an elliptical wall on the dynamic behaviors of a bubble restricted by two parallel plates

Ultrasonics Sonochemistry, Journal Year: 2024, Volume and Issue: 107, P. 106915 - 106915

Published: May 17, 2024

The present paper investigates the dynamic behaviors of a bubble restricted by two parallel plates near an elliptical wall. typical experimental phenomena are recorded employing high-speed photography and theoretical Kelvin impulse model is established. impacts spatial position curvature wall on collapse quantitatively investigated through verified against results. intensity direction during process compared discussed for different elliptical-shaped walls. main conclusions include: (1) During process, phenomenon uneven splitting discovered. (2) At positions curvatures, jet angle, movement distance, velocity in good agreement with predictions. (3) As short-to-long axis ratio increases, differences distributions gradually become larger, range influence expands.

Language: Английский

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Experimental study on the flow field inside soap bubble at different incident velocities

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

Bubbles are widely present in nature. However, previous scientific studies have primarily focused on the development of outer contour bubble while neglecting changing behavior internal flow field due to difficulty implementing experiments. This study designs a simple experimental device that can conveniently observe changes inside avoiding tedious operation and high costs associated with particle image velocimetry (PIV) system. Accordingly, this experiment investigates process velocity conditions required for formation different incident velocities Reynolds numbers. The first examines minimum necessary formation. Then, under low-speed conditions, straw is laminar, exhibits single vortex structure. Under high-speed transitions turbulent flow, four-vortex structure shows variations as increases. In addition, proposes corresponding physical models low verifies models.

Language: Английский

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Experimental Investigations on the Cavitation Bubble Dynamics near the Boundary of a Narrow Gap

Symmetry, Journal Year: 2024, Volume and Issue: 16(5), P. 541 - 541

Published: May 1, 2024

Cavitation bubbles near narrow gaps widely exist within microfluidic control devices. In the present paper, a laser-induced cavitation bubble is arranged in gap composed of two parallel plates. The inception position set to be at same distance from plates so that dynamic behaviors are symmetrical. collapse and rebound dynamics boundary investigated through high-speed photography. (e.g., shape deformation, translational movement, jet characteristics) analyzed while considering influence dimensionless between width. principal findings include following: (1) When small, violent towards generated during stage, along with weak counter-jet appearing stage. (2) As increases, stage initially decreases, then finally decreases zero. (3) Within parameter range considered this width mainly affects expansion degree movement direction cloud its subsequent stages. above research can provide experimental support for bubble-driven flow control, pumping, liquid mixing channels.

Language: Английский

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Visualization of Bubble Collapse Dynamics

SpringerBriefs in energy, Journal Year: 2024, Volume and Issue: unknown, P. 75 - 92

Published: Jan. 1, 2024

Language: Английский

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Prediction Model of Bubble Collapse Jet

SpringerBriefs in energy, Journal Year: 2024, Volume and Issue: unknown, P. 51 - 73

Published: Jan. 1, 2024

Language: Английский

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Investigation on the cylindrical bubble dynamics near a wall with an arched bulge

Journal of Hydrodynamics, Journal Year: 2024, Volume and Issue: 36(6), P. 1073 - 1082

Published: Dec. 1, 2024

Language: Английский

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