Abstract
The paper deals with the influence of the spatial confinement on the evolution of laser bubbles and shock waves by means of the shadowgraphy technique. Due to the constraint of walls, the bubble center shrinks faster than the bubble edge and collapses before the edge of the bubble, splitting into left and right small bubbles that continue to shrink down. The result validates that the Bjerknes force has little effect on bubble evolution at the expansion stage but a great influence on it at the collapse stage. We study the evolution of laser bubbles with different Al-plate intervals for displaying a gradual transition from constrained conditions to unconstrained conditions. In addition, we describe the dynamics of the first bubble at the expansion stage using the Rayleigh-Plesset equation. The pressure and temperature inside laser bubbles are calculated in the meanwhile.
Highlights
Bubble dynamics has found important applications in many fields, such as shipbuilding engineering,1–3 mechanical engineering,4–6 ocean engineering,7–9 chemical engineering,10–12 nanomaterial engineering,13–15 nuclear engineering,16–18 medical science,19–21 and so on
We report on a study of the effect of spatial confinement on laser bubble dynamics, which was carried out using a pair of aluminum plate walls
The evolution of bubble and shock waves in space confinement has been studied under water by the time-resolved shadowgraphy images
Summary
Bubble dynamics has found important applications in many fields, such as shipbuilding engineering, mechanical engineering, ocean engineering, chemical engineering, nanomaterial engineering, nuclear engineering, medical science, and so on. The abovementioned bubble dynamics and motion under water are multiphase problems involving very complex physical processes, such as heat and mass transfer effects, phase changes, hydrodynamic effects, and bubble evolution deformation.. The abovementioned bubble dynamics and motion under water are multiphase problems involving very complex physical processes, such as heat and mass transfer effects, phase changes, hydrodynamic effects, and bubble evolution deformation.30 These complex phenomena and evolution processes bring great challenges to theoretical analysis, numerical simulation, and experimental research of bubble dynamics.. The laser bubble is an important branch in the field of bubble dynamics research, which belongs to a high pressure pulsating bubble, and its theoretical study is similar to that of the underwater explosion bubble and air gun bubble. The pressure and temperature inside the bubble are calculated in the
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