Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Interfacial Phenomena and Heat Transfer
ESCI SJR: 0.258 SNIP: 0.574 CiteScore™: 0.8

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

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
S.S. Kutateladze Inst. of Thermophysics, Siberian Branch of Russian Academy of Sciences
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:

CHARACTERISTIC STRUCTURE OF UPWARD BUBBLE FLOW
Dynamics of Two-Phase Flows, Vol.1, 1988, issue
G. Matsui
EFFECTS OF RAPID SPANWISE ROTATION ON TURBULENT CHANNEL FLOW WITH A PASSIVE SCALAR
TSFP DIGITAL LIBRARY ONLINE, Vol.7, 2011, issue
Arne V. Johansson, Geert Brethouwer, Phillipp Schlatter
COHERENT STRUCTURES IN ACCELERATING LOW REYNOLDS NUMBER JETS
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
Jose C. F. Pereira, Carlos B. da Silva
Direct numerical simulation of separated-flow transition in low-pressure turbine
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2018, issue
Song Fu, S. Jiang
COMPARISON ON BUBBLE DEFORMATION AND INFLUENCE ON WALL SHEAR STRESS IN SIMPLE SHEAR FLOW BETWEEN TWO- AND THREE-DIMENSIONAL COMPUTATIONS
Interfacial Phenomena and Heat Transfer, Vol.7, 2019, issue 1
Rui Peng Niu, Ming Jun Pang