Journal of Hydrodynamics, Journal Year: 2024, Volume and Issue: 36(6), P. 1073 - 1082
Published: Dec. 1, 2024
Language: Английский
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
Citations
10
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)
Published: Jan. 1, 2025
This study systematically investigates the impact of a flat wall and cylinder on bubble dynamics within confined space. Based circle theorem image method, Kelvin impulse theoretical model considering motion is established. high-speed photography experiments, typical experimental phenomena oscillation are qualitatively exhibited. The morphology evolution centroid compared with results liquid velocity impulse. influence mechanisms explored, quantitatively explored. main conclusions summarized as follows: (1) distribution can effectively predict centroid's movement interface motion, respectively; (2) when comparable size, wall's surface greater than that cylinder's surface, field much cylinder; (3) bubble–cylinder bubble–wall distances increase, velocities away from decrease in final stage collapse.
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)
Published: Jan. 1, 2025
The present work investigates the unequal splitting of cavitation bubbles near rigid boundaries within a narrow gap. Based on high-speed photographic experiments, typical phenomenon bubble is shown, and parametric partitions in proximity to cylinder flat wall are presented. Kelvin impulse theory, underlying physical bubble-splitting mechanisms explored. In addition, impacts main parameters quantitatively analyzed. conclusions as follows. (1) Under different cylinder–bubble distances, splits into three cases: an upper larger part lower smaller part, two equal-sized parts, part. (2) caused by inconsistencies between directions bubble-collapse jet centroid movement. (3) As radius cylinder–wall distance increase, shifts from case 1 3, suggesting effect increases flat-wall decreases.
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(5)
Published: May 1, 2025
The investigation of nonlinear characteristics cylindrical bubbles plays an important role in engineering fields such as underwater explosions and ship propeller cavitation. In the present paper, behaviors primary resonance excited by square wave are investigated compressible liquids using multi-scale method Lyapunov stability theory. influences excitation intensity, equilibrium bubble radius, polytropic exponent, detuning parameters on explored. findings encapsulated follows: (1) amplitude phase response demonstrate multivalued solutions, jumps, hysteresis phenomena. (2) As intensity radius increase, frequency peak shifts along backbone curve toward smaller parameters, unstable region expands, threshold for chaos is reduced. (3) Compared to results obtained under sinusoidal excitation, demonstrates values, a narrower range regions, higher threshold.
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(10)
Published: Oct. 1, 2024
The collapse of a laser-induced bubble near cylinder within confined space is investigated using high-speed photography and the Kelvin impulse theory. On basis an analysis liquid flow field impulse, effects bubble–cylinder distance radius ratio on behavior are investigated. Furthermore, motion during first oscillation period quantitatively explored main conclusions this study as follows: (1) When not restricted by cylinder, three cases jets observed—strong jet, medium weak jet. deformation observed—fan-shaped collapse, ellipse-shaped quasi circular shaped collapse. (2) mainly affects velocity surrounding through term point sink, from bubble. (3) intensity exhibits exponentially decreasing trend with increasing distance, which in good agreement experimentally observed jet velocities.
Language: Английский
Citations
3
SpringerBriefs in energy, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 6
Published: Jan. 1, 2024
Citations
0
Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)
Published: Nov. 1, 2024
In the present paper, paramount characteristics of resonance cylindrical bubbles in a compressible liquid are theoretically investigated with multi-scale analysis. Considering liquid's compressibility, dimensionless equation bubble wall motion is established for primary under single-frequency acoustic field. Comparing numerical results, analytical solution verified terms accuracy. The key parameters on further explored including equilibrium radius, amplitude field, and other detuning parameters. main conclusions given as follows: (1) During resonance, three typical nonlinear phenomena observed: multivalued solutions, jumps, hysteresis phenomena. (2) compressibility affects intensity waves emitted by during resonance. maximum pressure at interface incompressible higher than that liquid. (3) amplitude–frequency curve, unstable region smaller peak lower
Language: Английский
Citations
0
Ultrasonics Sonochemistry, Journal Year: 2024, Volume and Issue: 112, P. 107168 - 107168
Published: Nov. 19, 2024
Language: Английский
Citations
0
Ultrasonics Sonochemistry, Journal Year: 2024, Volume and Issue: 112, P. 107169 - 107169
Published: Nov. 19, 2024
Language: Английский
Citations
0
Ultrasonics Sonochemistry, Journal Year: 2024, Volume and Issue: 112, P. 107174 - 107174
Published: Nov. 24, 2024
Language: Английский
Citations
0