Velocity of a Large Bubble Rising in a Stagnant Liquid Inside an Inclined Rectangular Channel.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F19%3A00510808" target="_blank" >RIV/67985858:_____/19:00510808 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11104/0305529" target="_blank" >http://hdl.handle.net/11104/0305529</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5123043" target="_blank" >10.1063/1.5123043</a>

Result language

angličtina

Original language name

Velocity of a Large Bubble Rising in a Stagnant Liquid Inside an Inclined Rectangular Channel.

Original language description

The velocity of large air bubbles rising in an inclined rectangular channel filled up with stagnant water is investigated within the inertial flow regime. The experiments based on bubble observation by means of a high-speed camera are carried-out in a versatile channel with easily adaptable geometry over a wide range of inclination angles. The results obtained in vertical channels of various aspect ratios are confronted with the previous analytical predictions to confirm bubble velocity scaling based on the channel perimeter. The extrapolation of velocity measurements done at very low inclinations then provides the translation velocities of large bubbles corresponding to horizontal channel placements. These velocities agree well with the results of previous channel emptying experiments and suggest velocity scaling based on the channel height. Markedly different dependences of the bubble rise velocity on the channel inclination are observed in flat and tall channels. The analysis of our experimental data provides a simple model for the prediction of the bubble rise velocity in inclined rectangular channels. The effects of leveling and buoyancy, which are jointly acting on bubbles in inclined channels, are incorporated into the model through two principal parameters: the limiting bubble velocities achieved at the horizontal and vertical channel placement. Considering the inertial regime of large Taylor bubbles, these limiting velocities are predictable with a sufficient accuracy.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Physics of Fluids

ISSN

1070-6631

e-ISSN

—

Volume of the periodical

31

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

113301

UT code for WoS article

000515320800028

EID of the result in the Scopus database

2-s2.0-85074542093