Modification of Shape Oscillations of an Attached Bubble by Surfactants

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F13%3A00393230" target="_blank" >RIV/67985858:_____/13:00393230 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/epjconf/20134501095" target="_blank" >http://dx.doi.org/10.1051/epjconf/20134501095</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/20134501095" target="_blank" >10.1051/epjconf/20134501095</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modification of Shape Oscillations of an Attached Bubble by Surfactants

Popis výsledku v původním jazyce

In the experiments, shape oscillations of a bubble are invoked by a motion of a capillary, to which the bubble is injected. Decaying oscillations are recorded and their frequency and damping are evaluated. By changing the excitation frequency, three lowest oscillation modes are studied. Experiments were repeated in aqueous solution of several surfactants at various concentrations. Generally, these features are observed: Initially a surfactant addition leads to an increase of the oscillation frequency; this effect can be attributed to the increasing interfacial elasticity. The decay time of oscillation is strongly decreasing, as a consequence of energy dissipation linked with Marangoni stresses. At a certain critical concentration, frequency decreases abruptly and the decay time passes by a minimum. With further addition of surfactant, frequency decreases, and the decay time slightly lengthens. Above critical micelle concentration, all these parameters stabilize. Interestingly, the crit

Název v anglickém jazyce

Modification of Shape Oscillations of an Attached Bubble by Surfactants

Popis výsledku anglicky

In the experiments, shape oscillations of a bubble are invoked by a motion of a capillary, to which the bubble is injected. Decaying oscillations are recorded and their frequency and damping are evaluated. By changing the excitation frequency, three lowest oscillation modes are studied. Experiments were repeated in aqueous solution of several surfactants at various concentrations. Generally, these features are observed: Initially a surfactant addition leads to an increase of the oscillation frequency; this effect can be attributed to the increasing interfacial elasticity. The decay time of oscillation is strongly decreasing, as a consequence of energy dissipation linked with Marangoni stresses. At a certain critical concentration, frequency decreases abruptly and the decay time passes by a minimum. With further addition of surfactant, frequency decreases, and the decay time slightly lengthens. Above critical micelle concentration, all these parameters stabilize. Interestingly, the crit

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

EPJ Web of Conferences

ISSN

2100-014X

e-ISSN

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Svazek periodika

45

Číslo periodika v rámci svazku

2013

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

4

Strana od-do

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Kód UT WoS článku

000319932200095

EID výsledku v databázi Scopus

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