Asymmetric deformation of bubble shape: cause or effect of vortex-shedding?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F14%3A86086615" target="_blank" >RIV/61989100:27350/14:86086615 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985858:_____/14:00428014 RIV/61989100:27360/14:86086615 RIV/61989100:27710/14:86086615

Výsledek na webu

<a href="http://dx.doi.org/10.2478/s11696-013-0406-9" target="_blank" >http://dx.doi.org/10.2478/s11696-013-0406-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/s11696-013-0406-9" target="_blank" >10.2478/s11696-013-0406-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Asymmetric deformation of bubble shape: cause or effect of vortex-shedding?

Popis výsledku v původním jazyce

Two perpendicular projections of rising bubbles were observed in counter-current downstream diverging flow. Evidently, the bubbles did not enter the boundary layer at the channel wall and a plug liquid flow assumption was acceptable in our experimental equipment. This confirmed that the experiment was appropriate for simulation of bubble rises in a quiescent liquid column. Recent data obtained by a high-speed camera permitted recording over a period of 60 s. Image analysis by a tailor-made program provided a time-series of quantities related to the position, size, and shape of bubbles. In addition to determination of the aspect ratio of the equivalent oblate ellipsoid, deviation from this shape was investigated in respect of the difference between thebubble's centre of mass and the geometrical centre of bubble projection. Autocorrelation of the data indicated that the bubble inclination oscillated harmonically with a frequency of 5-10 Hz; cross correlation showed that the horizontal s

Název v anglickém jazyce

Asymmetric deformation of bubble shape: cause or effect of vortex-shedding?

Popis výsledku anglicky

Two perpendicular projections of rising bubbles were observed in counter-current downstream diverging flow. Evidently, the bubbles did not enter the boundary layer at the channel wall and a plug liquid flow assumption was acceptable in our experimental equipment. This confirmed that the experiment was appropriate for simulation of bubble rises in a quiescent liquid column. Recent data obtained by a high-speed camera permitted recording over a period of 60 s. Image analysis by a tailor-made program provided a time-series of quantities related to the position, size, and shape of bubbles. In addition to determination of the aspect ratio of the equivalent oblate ellipsoid, deviation from this shape was investigated in respect of the difference between thebubble's centre of mass and the geometrical centre of bubble projection. Autocorrelation of the data indicated that the bubble inclination oscillated harmonically with a frequency of 5-10 Hz; cross correlation showed that the horizontal s

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Chemical papers

ISSN

0366-6352

e-ISSN

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Svazek periodika

68

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

74-79

Kód UT WoS článku

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EID výsledku v databázi Scopus

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