Effect of Liquid and Solid Properties on Bubble-Wall Collisions

0326857 - ÚCHP 2010 SK eng C - Conference Paper (international conference)
Zedníková, Mária - Vobecká, Lucie - Vejražka, Jiří - Růžička, Marek - Drahoš, Jiří
Effect of Liquid and Solid Properties on Bubble-Wall Collisions.
Proceedings. Bratislava: Slovak University of Technology, 2009 - (Markoš, J.), s. 343. ISBN 978-80-227-3072-3.
[International Conference of Slovak Society of Chemical Engineering /36./. Tatranské Matliare (SK), 25.05.2009-29.05.2009]
R&D Projects: GA AV ČR(CZ) KJB200720801
Institutional research plan: CEZ:AV0Z40720504
Keywords : bubble-wall collision * flotation * surfactants
Subject RIV: CI - Industrial Chemistry, Chemical Engineering

The effect of surfactant concentration on hydrodynamics of bubble bouncing on the hydrophilic wall is investigated as well as the effect of solid properties. The collision process is observed by high-speed camera and the bubble shape and mass centre position is evaluated from image treatment. Air is used as gas phase. Deionised water and terpineol solutions of various concentrations are used as a liquid phase. Solid properties vary in dependence on used materials. It is obtained that the terpienol presence in liquid significantly dumps the bubble oscillations and rebound distance from the wall. In contrary, the change of solid properties does not affect the hydrodynamics of bubble approaching the surface. The experimental data are compared with the theoretical model derived from the balance of forces acting on the bubble. The sufficient agreement of the bubble deceleration before impact with the wall is found between the experimental and modelled data for all the liquids used.
Permanent Link: http://hdl.handle.net/11104/0173825