Bubble dynamics and its application in dental cleaning

Yu, You (2024). Bubble dynamics and its application in dental cleaning. University of Birmingham. Ph.D.

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Abstract

Hydrodynamic cavitation is associated with broad and vital applications, including pump, turbine, and propeller damage. Acoustic cavitation also has biomedical ultrasound, sonochemistry, and cavitation cleaning applications. This thesis includes three published journal articles concerned with the dynamics of a single bubble in a viscous compressible liquid near a rigid boundary at a moderately large Reynolds number of O(10-100) and the application of bubble clouds in dental cleaning.

Chapter 3 explores the bubble dynamics near a rigid boundary for a Reynolds number of O(10-100) by experiments and simulations. A non-reflective boundary condition is proposed based on the far-field asymptotic behaviour. New mechanisms are found for the development of bubble jetting, the vortex sheet, and the vortex ring.

In Chapter 4, numerical studies have been conducted for a scaler vibrating in a periodontal pocket using ABAQUS based on the finite element method. A parametric study has been carried out in terms of the volume of the pocket, the taper ratio, and the immersion depth of the scaler tip in the pocket.

In Chapter 5, we further analyse how the scaler’s amplitude, frequency, and cross-sectional shape affect cavitation generation in the pocket to provide practical guidance for optimising dental scaler settings, which can improve oral hygiene and prevent complications related to dental implants.

Type of Work:

Thesis (Doctorates > Ph.D.)

Award Type:

Doctorates > Ph.D.

Supervisor(s):