This paper is concerned with bubble dynamics at a corner formed by two flat rigid boundaries, which is associated with applications in ultrasonic cleaning and cavitation damage. This phenomenon is modelled using the potential flow theory and the boundary integral method. The Green function is obtained to satisfy the impenetrable conditions at the rigid boundaries using the method of images, with the corner angle = /k, where k is a natural number. To evaluate the numerical model, experiments were carried out with a spark-generated bubble in water and recorded by a high-speed camera. The predicted bubble shapes have excellent agreement with experiments. A jet forms towards the end of the collapse, pointing to the corner when initiated at the bisector of the two walls, but pointing to the near wall and inclined to the corner when initiated nearer one of the two walls. The Kelvin impulse theory predicts the jet direction well. As compared to a bubble near a flat wall, the oscillation period and the jet width increase but the jet velocity decreases. The bubble migrates away from the near wall and corner during its expansion and moves back towards them during its collapse, but at much larger speed and amplitude. A velocity stagnation point forms at the start of the collapse and a high-pressure zone is generated at the base of the jet during the late stages of the collapse, which drives the jet and the bubble towards the near wall and corner.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.