Document Detail


Energy partition at the collapse of spherical cavitation bubbles.
MedLine Citation:
PMID:  23214685     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Spherically collapsing cavitation bubbles produce a shock wave followed by a rebound bubble. Here we present a systematic investigation of the energy partition between the rebound and the shock. Highly spherical cavitation bubbles are produced in microgravity, which suppresses the buoyant pressure gradient that otherwise deteriorates the sphericity of the bubbles. We measure the radius of the rebound bubble and estimate the shock energy as a function of the initial bubble radius (2-5.6mm) and the liquid pressure (10-80kPa). Those measurements uncover a systematic pressure dependence of the energy partition between rebound and shock. We demonstrate that these observations agree with a physical model relying on a first-order approximation of the liquid compressibility and an adiabatic treatment of the noncondensable gas inside the bubble. Using this model we find that the energy partition between rebound and shock is dictated by a single nondimensional parameter ξ=Δpγ^{6}/[p_{g0}^{1/γ}(ρc^{2})^{1-1/γ}], where Δp=p_{∞}-p_{v} is the driving pressure, p_{∞} is the static pressure in the liquid, p_{v} is the vapor pressure, p_{g0} is the pressure of the noncondensable gas at the maximal bubble radius, γ is the adiabatic index of the noncondensable gas, ρ is the liquid density, and c is the speed of sound in the liquid.
Authors:
M Tinguely; D Obreschkow; P Kobel; N Dorsaz; A de Bosset; M Farhat
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Publication Detail:
Type:  Journal Article     Date:  2012-10-17
Journal Detail:
Title:  Physical review. E, Statistical, nonlinear, and soft matter physics     Volume:  86     ISSN:  1550-2376     ISO Abbreviation:  Phys Rev E Stat Nonlin Soft Matter Phys     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-12-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101136452     Medline TA:  Phys Rev E Stat Nonlin Soft Matter Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  046315     Citation Subset:  IM    
Affiliation:
Laboratoire des Machines Hydrauliques, EPFL, 1007 Lausanne, Switzerland.
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