Please use this identifier to cite or link to this item: http://hdl.handle.net/11422/8399
Type: Artigo
Title: Experimental study of the falling film of liquid around a Taylor bubble
Author(s)/Inventor(s): Azevedo, Marcos Bertrand de
Santos, Douglas dos
Faccini, José Luiz Horacio
Su, Jian
Abstract: Indisponível.
Abstract: The present work reports an experimental study of the falling liquid film around single Taylor bubbles rising in vertical tubes filled with stagnant liquids by using a pulse-echo ultrasonic technique. The experiments were carried out in acrylic tubes 2.0 m long, with inner diameters of 0.019, 0.024 and 0.034 m, with five water-glycerin mixtures, corresponding to inverse viscosity number ranging from 15 to 22422. The rising bubble and the falling liquid film were measured by using ultrasonic transducers located at the one side of the tube. The velocity and profile of the Taylor bubble, and the development length and equilibrium thickness of the falling liquid film around the bubble were obtained by the ultrasonic signals processing. Based on the experimental results of the present study, several correlations available to estimate the equilibrium thicknesses of liquid films falling around Taylor bubbles were evaluated and new correlations were proposed to estimate the dimensionless equilibrium film thickness and the film development length respectively.
Keywords: Taylor bubble
Falling liquid film
Equilibrium film thickness
Film development length
Ultrasonic technique
Stagnant liquid
Subject CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
Department : Núcleo Interdisciplinar de Dinâmica dos Fluidos
Publisher: Elsevier
In: International Journal of Multiphase Flow
Volume: 88
Issue Date: 6-Oct-2016
DOI: 10.1016/j.ijmultiphaseflow.2016.09.021
Publisher country: Brasil
Language: eng
Right access: Acesso Aberto
ISSN: 0301-9322
Appears in Collections:Engenharias

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