Effect of Liquid Properties and Solid Material on Bubble-Wall Attachment

0348330 - ÚCHP 2011 US eng C - Konferenční příspěvek (zahraniční konf.)
Zedníková, Mária - Vobecká, Lucie - Vejražka, Jiří - Růžička, Marek - Drahoš, Jiří
Effect of Liquid Properties and Solid Material on Bubble-Wall Attachment.
Book of Abstracts. 2010, 238/6.2.4/. ISBN N.
[International Conference on Multiphase Flow ICMF 2010 /7./. Tampa, Florida (US), 30.05.2010-04.06.2010]
Grant CEP: GA ČR GA104/07/1110; GA AV ČR(CZ) KJB200720801; GA AV ČR(CZ) IAA200720801
Výzkumný záměr: CEZ:AV0Z40720504
Klíčová slova: bubble-wall collision * surfactant * bubble attachment
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

The contribution deals with the experimental study of bubble interactions with an immersed horizontal solid wall. The effect of surfactant concentration (limited to a specific nonionic surfactant, terpineol) and the effect of solid wall material is investigated. The adsorption dynamics of terpineol surfactant is studied and adsorption parameters are evaluated on the base of Langmuir isotherm. To study the effect of solid material, the cleaned glass is used as a hydrophilic surface and polyethylene(PE), polypropylene (PP) and Teflon are used as the surfaces with different degree of hydrophobicity. Two particular stages of interactions (collision/bouncing and attachment process) are observed by the means of high-speed camera. The hydrodynamics of bubble-wall collisions is not affected by the material of solids while it is strongly affected by the presence of surfactant.
Trvalý link: http://hdl.handle.net/11104/0188888