Statistical description of the bubble cloud resulting from the injection of air into a turbulent water jet

Martínez Bazán, Carlos and Montañés García, José Luis and Lasheras, Juan C. (2002). Statistical description of the bubble cloud resulting from the injection of air into a turbulent water jet. "International Journal of Multiphase Flow", v. 28 (n. 4); pp. 597-615. ISSN 0301-9322. https://doi.org/10.1016/S0301-9322(01)00078-7.

Description

Title: Statistical description of the bubble cloud resulting from the injection of air into a turbulent water jet
Author/s:
  • Martínez Bazán, Carlos
  • Montañés García, José Luis
  • Lasheras, Juan C.
Item Type: Article
Título de Revista/Publicación: International Journal of Multiphase Flow
Date: April 2002
ISSN: 0301-9322
Volume: 28
Subjects:
Freetext Keywords: Turbulence; Jet; Bubble; Break-up; Size distribution
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The final bubble size distribution, resulting from the break-up of an air jet injected into the central axis of a fully developed, high Reynolds number turbulent water jet has been measured using a Phase Doppler Particle Analyzer (PDPA). The shape of the final size distribution is shown to depend not only on the dissipation rate of turbulent kinetic energy, ε, but also on the global void fraction, αH. It has been shown that such a dependence can be expressed as a function of two dimensionless numbers, namely the jet Weber number, Wen=ρUJ2DJ/σ, and the ratio between the initial bubble's size and the critical diameter, D0/Dc. The statistical properties of the time and distance separating two bubbles of the same diameter, after the turbulent break process is complete, have also been measured. The probability density function of the inter-arrival time between two consecutive bubbles was found to follow an exponential distribution with intensity factor, λ, depending on the number density of bubbles of a certain diameter and on the velocity of the flow.

More information

Item ID: 5937
DC Identifier: http://oa.upm.es/5937/
OAI Identifier: oai:oa.upm.es:5937
DOI: 10.1016/S0301-9322(01)00078-7
Official URL: http://www.sciencedirect.com
Deposited by: Memoria de Investigacion 2
Deposited on: 08 Feb 2011 18:14
Last Modified: 20 Apr 2016 14:37
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