Wall Shear Stress Induced by Taylor Bubbles in Inclined Flow Channels

0383793 - ÚCHP 2013 RIV CZ eng C - Conference Paper (international conference)
Tihon, Jaroslav - Pěnkavová, Věra - Vejražka, Jiří
Wall Shear Stress Induced by Taylor Bubbles in Inclined Flow Channels.
Proceedings. Liberec: Technical University of Liberec, 2012 - (Vít, T.; Danč ová, P.; Novotný, P.), s. 723-728. ISBN 978-80-7372-912-7.
[Experimental Fluid Mechanics 2012 /7./. Hradec Králové (CZ), 20.11.2012-23.11.2012]
R&D Projects: GA ČR(CZ) GAP101/12/0585
Institutional support: RVO:67985858
Keywords : Taylor bubble * electrodiffusion method * wall shear stress
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
http://efm.kez.tul.cz/

The motion of single air bubbles in flat channels is experimentally investigated. The electrodiffusion technique of near-wall flow diagnostics is applied to measure the wall shear stress distribution under large rising bubbles. The measurements are synchronized with the visual observation of bubble movement by a high-speed camera. The analysis of video records provides information on the bubble shape and terminal velocity. The experiments are carried out for three different channel configuration (with heights of 1.5, 4, and 8 mm), cover a wide range of channel inclination angles (from horizontal to vertical position), and dealing with both the bubbles in stagnant and in co-flowing water.
Permanent Link: http://hdl.handle.net/11104/0213628