Shape and rising velocity of bubbles
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F09%3A00022399" target="_blank" >RIV/61989100:27360/09:00022399 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Shape and rising velocity of bubbles
Original language description
Common medium-size bubbles that are produced by breakup of gas stream (for air-water system volume of such bubbles is 10-500 mm3) are mostly like oblate ellipsoids and their rising path is somewhat helical. Correlations presented in this paper are basedon records of rising bubbles, obtained using a high speed video camera. Shape of a bubble and its velocity was determined from time series of characteristic parameters of the bubble projection obtained by image analysis. For this purpose, we have developed a mathematical model of the bubble image including three parameters: eccentricity of the ellipsoid, amplitude of the wobbling, and angular rotation. For different low- and medium-viscosity liquids, eccentricity of the ellipsoids approximating the bubble shape is a function of Eötvös number, viscosity effect being negligible. On the other side, the bubble rising velocity depends both on viscosity and surface tension. However, the effect of surface tension may be included to the estimat
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
CI - Industrial chemistry and chemical engineering
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA104%2F07%2F1110" target="_blank" >GA104/07/1110: Hydrodynamics and transport phenomena in multiphase systems: from microscale to macroscale</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
36th International Conference of Slovak Society of Chemical Engineering
ISBN
978-80-227-3072-3
ISSN
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e-ISSN
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Number of pages
12
Pages from-to
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Publisher name
Slovak Society of Chemical Engineering,
Place of publication
Bratislava
Event location
Hotel Hutník, Tatranské Matliare, Slovakia
Event date
May 25, 2009
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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