Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Interfacial Phenomena and Heat Transfer
ESCI SJR: 0.146

ISSN Imprimir: 2169-2785
ISSN En Línea: 2167-857X

Open Access

Interfacial Phenomena and Heat Transfer

DOI: 10.1615/InterfacPhenomHeatTransfer.2018021444
pages 99-114

THE BUBBLY WALL SHEAR STRESS IN A VERTICAL UPWARD LAMINAR TUBE FLOW

V. E. Nakoryakov
S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Pr. Ac. Lavrentev, 1, Novosibirsk, 630090, Russia
Leonid S. Timkin
Kutateladze Institute of Thermophysics, Pr. Ac. Lavrentev, 1, Novosibirsk, 630090, Russia
R. S. Gorelik
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Pr. Ac. Lavrentev, 1, Novosibirsk, 630090, Russia

SINOPSIS

The results of experimental investigation of upward laminar flow with bubbles are presented. An electrodiffusional technique is used to detect perturbation of the wall shear stress caused by bubbles in the tube flow. A bubble generator based on the flow focusing technique has been developed for production of a submillimeter monodispersed bubbles mixture. It is proven that submillimeter bubbles significantly increase the flow mass transfer: the smaller the bubble diameter, the greater is the wall shear stress. Some peculiarities of the interaction are the detection of inherent liquid turbulence and pseudoturbulence induced by bubbles. It is shown that the additivity of pseudoturbulence and inherent liquid pulsations is fulfilled only for Reb > 100, when for some smaller Reb values this is not valid. The shear stress perturbations by single bubbles have complex structure. It is possible to define three components of perturbation caused by a single small bubble. The perturbation by a Taylor bubble contains only two components due to the main flow symmetry around the bubble. An unexpectedly long shear stress pulsation zone is registered behind single small almost spherical bubbles and Taylor bubbles.


Articles with similar content:

Effects of microbubbles injection in a turbulent boundary layer
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
A. Olivieri, Boris Jacob, E. F. Campana, Renzo Piva, M. Miozzi
DIRECT NUMERICAL SIMULATIONS OF COAXIAL JETS MIXING PROPERTIES
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
Mohamed Si-Ameur, Guillaume Balarac, Marcel Lesieur, Olivier Metais
DERIVATIVES IN TURBULENT FLOW IN AN ATMOSPHERIC SURFACE LAYER WITHOUT TAYLOR HYPOTHESIS
TSFP DIGITAL LIBRARY ONLINE, Vol.3, 2003, issue
Barak Galanti, Gregory Gulitsky, Arkady Tsinober, Michael Kholmyansky, Svyatoslav Yorish
APPLICATION OF CONTINUOUS WAVELET TRANSFORMS TO THE ANALYSIS OF EXPERIMENTAL TURBULENT VELOCITY SIGNALS
TSFP DIGITAL LIBRARY ONLINE, Vol.1, 1999, issue
Giovanni Lombardi, Guido Buresti
APPLICATION OF CONTINUOUS WAVELET TRANSFORMS TO THE ANALYSIS OF EXPERIMENTAL TURBULENT VELOCITY SIGNALS
Turbulence and Shear Flow Phenomena -1 First International Symposium, Vol.0, 1999, issue
Giovanni Lombardi, Guido Buresti