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Comparison of the Rayleigh-Plesset and Gilmore equations and additional aspects for the modelling of seismic airgun bubble dynamics

conference contribution
posted on 2023-05-23, 07:18 authored by De Graaf, KL, Irene PenesisIrene Penesis, Paul BrandnerPaul Brandner

Seismic airguns are commonly used in geophysical exploration. More recently, they are also being used as an alternative to underwater explosions for the shock testing of defence vessels. The study of the dynamics of the bubble produced by a seismic airgun is beneficial in understanding the resultant pressure field and shockwave.

The Rayleigh–Plesset and Gilmore equations for modelling spherical bubble dynamics are compared for the expansion of an initially highly pressurised gas bubble. The relationship between initial gas pressure and both the first maximum bubble radius and the first period of oscillation are presented. The initial gas pressure is non-dimensionalised against hydrostatic pressure and studied over a range of 1 – 50. The separate contributions of presence of the airgun body, mass throttling, effective viscosity and heat diffusion to the first maximum radius and period are modelled and discussed. The effects of evaporation and condensation at the bubble wall are also considered.

History

Publication title

Proceedings of the 18th Australasian Fluid Mechanics Conference

Editors

PA Brandner and BW Pearce

Pagination

1-4

ISBN

9780646583730

Department/School

Australian Maritime College

Publisher

Australasian Fluid Mechanics Society

Place of publication

Launceston, Tasmania, Australia

Event title

18th Australasian Fluid Mechanics Conference

Event Venue

Launceston, Tasmania, Australia

Date of Event (Start Date)

2012-12-03

Date of Event (End Date)

2012-12-07

Rights statement

Copyright 2012 Leishman Associates

Repository Status

  • Restricted

Socio-economic Objectives

Maritime

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    University Of Tasmania

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