Flow pattern of rising bubbles - periodical oscillations of shape and velocity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F07%3A00016285" target="_blank" >RIV/61989100:27360/07:00016285 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Flow pattern of rising bubbles - periodical oscillations of shape and velocity

Original language description

Experiments with rising bubbles levitating in a downward liquid flow enable a long-term observation of the bubble motion. Aim of the contribution is to observe rising of medium-sized ellipsoidal bubbles. Continuous phase is a low viscosity-liquid, 1 < Eo< 40, Re > 100. The bubble motion is wobbling and the path is helical. Extended set of data on bubble shape and bubble velocity oscillations is evaluated statistically. The variation of bubble shape is related to the interaction of external forces and surface tension. Simple hydrodynamic model is suggested. The model provides qualitative explanation of the bubble behavior and quantitative prediction of the oscillation frequency and amplitude. Typical values for bubbles of diameter 2 - 20 mm are following: average rising velocities of 0.2 - 0.3 m.s-1, oscillations of 5 - 6 s-1, and maximum drift velocities of 0.15 m.s-1. Particular results of experiments and CFD computations available in literature confirm suitability of the presented m

Czech name

Trajektorie stoupajících bublin - periodické oscilace tvaru a rychlosti

Czech description

Experiments with rising bubbles levitating in a downward liquid flow enable a long-term observation of the bubble motion. Aim of the contribution is to observe rising of medium-sized ellipsoidal bubbles. Continuous phase is a low viscosity-liquid, 1 < Eo< 40, Re > 100. The bubble motion is wobbling and the path is helical. Extended set of data on bubble shape and bubble velocity oscillations is evaluated statistically. The variation of bubble shape is related to the interaction of external forces and surface tension. Simple hydrodynamic model is suggested. The model provides qualitative explanation of the bubble behavior and quantitative prediction of the oscillation frequency and amplitude. Typical values for bubbles of diameter 2 - 20 mm are following: average rising velocities of 0.2 - 0.3 m.s-1, oscillations of 5 - 6 s-1, and maximum drift velocities of 0.15 m.s-1. Particular results of experiments and CFD computations available in literature confirm suitability of the presented m

Type

D - Article in proceedings

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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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)

Publication year

2007

Confidentiality

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

Article name in the collection

14th International Students' Day of Metallurgy - Proceedings

ISBN

978-3-00-021019-8

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

151-158

Publisher name

Förderverein der Fachschaft Physik, Materialwissenschaften und Chemie

Place of publication

Clausthal - Zellerfeld

Event location

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Event date

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Type of event by nationality

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UT code for WoS article

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