About: Damping Time of Bubble Oscillations in Clean Liquids and in Surfactants

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Shape oscillations of bubbles in surfactant solutions are investigated by means of high-speed imaging. Two cases are studied: bubbles attached to a capillary tip, and bubbles freely rising after detachment. The frequency f and the decay time tau of shape oscillations are evaluated, and their dependence on the surfactant concentration and on the bubble size is investigated. If the surfactant is present, tau shortens and a minimum is found for a certain concentration. This observation demonstrates that in the surfactant solutions, the energy dissipation linked to interfacial effects can be much more important than the dissipation due to liquid viscosity. The frequency f increases with increasing concentration of the surfactant first, and then it drops rapidly at concentration, at which tau is minimal. The initial increase of the oscillation frequency suggests that the interfacial elasticity can play an important role in surfactant solutions. Shape oscillations of bubbles in surfactant solutions are investigated by means of high-speed imaging. Two cases are studied: bubbles attached to a capillary tip, and bubbles freely rising after detachment. The frequency f and the decay time tau of shape oscillations are evaluated, and their dependence on the surfactant concentration and on the bubble size is investigated. If the surfactant is present, tau shortens and a minimum is found for a certain concentration. This observation demonstrates that in the surfactant solutions, the energy dissipation linked to interfacial effects can be much more important than the dissipation due to liquid viscosity. The frequency f increases with increasing concentration of the surfactant first, and then it drops rapidly at concentration, at which tau is minimal. The initial increase of the oscillation frequency suggests that the interfacial elasticity can play an important role in surfactant solutions. (en)
Title	Damping Time of Bubble Oscillations in Clean Liquids and in Surfactants Damping Time of Bubble Oscillations in Clean Liquids and in Surfactants (en)
skos:prefLabel	Damping Time of Bubble Oscillations in Clean Liquids and in Surfactants Damping Time of Bubble Oscillations in Clean Liquids and in Surfactants (en)
skos:notation	RIV/67985858:_____/11:00341645!RIV11-GA0-67985858
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA104/08/0428), P(IAA200720801), Z(AV0Z40720504)
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Tihon, Jaroslav Orvalho, Sandra Petronilho Vejražka, Jiří Vobecká, Lucie Zedníková, Mária
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	192819
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/11:00341645
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	bubble shape oscillation; surface active agent; interfacial viscosity (en)
http://linked.open.../riv/klicoveSlovo	bubble shape oscillation interfacial viscosity surface active agent
http://linked.open...ontrolniKodProRIV	[DFB2BB11046A]
http://linked.open...v/mistoKonaniAkce	Berlin
http://linked.open...i/riv/mistoVydani	Düsseldorf
http://linked.open...i/riv/nazevZdroje	Fortschritt-berichte VDI, Reihe 3, Nr. 920
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Effect of the surface roughness, ohmic resistance, and electrode kinetics on autocalibration of electrodiffusion friction probes Analysis of hydrodynamic forces acting on bubbles by PIV measurements
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Tihon, Jaroslav Orvalho, Sandra Petronilho Vejražka, Jiří Vobecká, Lucie Zedníková, Mária
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2009-10-08 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
number of pages	14 (xsd:int)
http://purl.org/ne...btex#hasPublisher	VDI Verlag
https://schema.org/isbn	978-3-18-392003-7

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