Pseudo-Steady Diffusional Growth or Collapse of Bubbles Rising in Time DependentPressure Fields

摘要

A pseudo-steady convective model for bubble diffusional growth or collapse whilerising in time dependent pressure fields has been developed. The bubble model assumes the neglect of added mass, history, and interfacial momentum terms. Criteria are developed to show when these terms affect the bubble motion.The pressure fields investigated are a simple hydrostatic head, a decompression hydrostatic head, and a hydrostatic head with the oscillation of the reference pressure (atmosphere above the hydrostatic head). Keywords: Diffusion equations; Velocity profiles; Bubble motion; Bubble dynamics; Ship wakes; Fluid dynamics. (KR)