2020-01-23T10:04:47Z
http://oa.upm.es/cgi/oai2
oai:oa.upm.es:5935
2016-04-20T14:37:02Z
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Bubble size distribution resulting from the breakup of an air cavity injected into a turbulent water jet
Martínez Bazán, Carlos
Montañés García, José Luis
Lasheras, Juan C.
Aeronautics
Physics
We investigated experimentally the shape of the final size PDF(D) resulting from the breakup of an air bubble injected into the fully developed region of a high Reynolds number turbulent water jet. It is shown that the PDF(Dcirc) of the normalized bubble size Dcirc=D/D32, where D32 is the Sauter mean diameter of the distribution, has a universal single shape independent of the value of the turbulent kinetic energy of the water jet at the bubble injection point and of the air void fraction, α. The shape of the exponential tails characterizing each PDF(D) is shown to be only a function of the initial bubble size D0 and the critical bubble size Dc, defined as Dc=(1.46σ/ρ)3/5ɛ-2/5, where ɛ is the value of the dissipation rate of turbulent kinetic energy per unit mass at the air injection point.
E.T.S.I. Aeronáuticos (UPM)
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
2000
info:eu-repo/semantics/article
Article
Physics of Fluids, ISSN 1070-6631, 2000, Vol. 12, No. 1
PeerReviewed
application/pdf
eng
http://www.aip.org/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.870290
http://oa.upm.es/5935/