RT Journal Article
SR 00
ID 10.1063/1.870290
A1 Martínez Bazán, Carlos
A1 Montañés García, José Luis
A1 Lasheras, Juan C.
T1 Bubble size distribution resulting from the breakup of an air cavity injected into a turbulent water jet
JF Physics of Fluids
YR 2000
FD 2000
VO 12
IS 1
SP 145
OP 148
AB 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.
PB American Institute of Physics
SN 1070-6631
LK http://oa.upm.es/5931/
UL http://www.aip.org/