Journal of Fluid Mechanics



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Experimental and numerical investigation of the dynamics of an underwater explosion bubble near a resilient/rigid structure


E. KLASEBOER a1, K. C. HUNG a1, C. WANG a1, C. W. WANG a1, B. C. KHOO a2a3c1, P. BOYCE a4, S. DEBONO a4 and H. CHARLIER a5
a1 Institute of High Performance Computing, Science Park Road, 01-01 The Capricorn, Singapore Science Park II, Singapore 117528
a2 Singapore MIT Alliance, 4 Engineering Drive 3, Singapore 117576 mpekbc@nus.edu.sg
a3 Department of Mechanical Engineering, National University of Singapore, Kent Ridge, Singapore 119260
a4 Centre Technique Des Systèmes Navals, BP 28, 83800 Toulon Naval, France ph.boyce@ctsn.dga.defense.gouv.fr
a5 ESI SOFTWARE SA, 99 rue des Solets, SILIC 112, 94513 Rungis Cedex, France Herve.Charlier@esi-group.com

Article author query
klaseboer e   [Google Scholar] 
hung kc   [Google Scholar] 
wang c   [Google Scholar] 
wang cw   [Google Scholar] 
khoo bc   [Google Scholar] 
boyce p   [Google Scholar] 
debono s   [Google Scholar] 
charlier h   [Google Scholar] 
 

Abstract

This paper deals with an experimental and numerical study of the dynamics of an underwater explosion and its associated fluid–structure interaction. Experimental studies of the complex fluid–structure interaction phenomena were carried out in a specially designed test pond. The pond is equipped with a high-speed camera and pressure and displacement sensors. The high-speed camera was used to capture the expansion and collapse of the gas bubble created by the explosion. Several different structures were used in the experiments, including both rigid and resilient plates of circular shape. The deformation of the plate was measured with a non-contact laser telemetry device. The numerical simulations of the explosion bubble interacting with a submerged resilient structure were performed using a three-dimensional bubble dynamics code in conjunction with a structural code. The bubble code is based on the boundary-element method (BEM) and has been coupled to a structural finite-element code (PAM-CRASH$^{\rm TM})$. The experimental results were compared against the numerical results for different bubble–structure configurations and orientations. Several physical phenomena that have been observed, such as bubble jetting and bubble migration towards the structure are discussed.

(Published Online August 4 2005)
(Received October 19 2004)
(Revised March 14 2005)


Correspondence:
c1 Author to whom correspondence should be addressed.


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