Global and Local Hydrodynamics of Bubble Columns – Effect of Gas Distributor.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F16%3A00454180" target="_blank" >RIV/67985858:_____/16:00454180 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.cej.2015.11.106" target="_blank" >http://dx.doi.org/10.1016/j.cej.2015.11.106</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2015.11.106" target="_blank" >10.1016/j.cej.2015.11.106</a>

Result language

angličtina

Original language name

Global and Local Hydrodynamics of Bubble Columns – Effect of Gas Distributor.

Original language description

Global (level swell) and local (WMS – Wire Mesh Sensor) measurements were made on waters of different purities and air, in a cylindrical laboratory bubble column (2 m tall, 0.127 m dia) using two different gas distributors: a perforated plate (to produce homogeneous flow) and a spider sparger (to produce heterogeneous flow). The level swell method provided the steady space-averaged gas holdup/gas flow rate data. The WMS method provided the actual gas holdups and bubble sizes resolved in time and space at one cross-sectional horizontal plane (1 m above distributor), whose integration yields the timeaveraged data. The following results were obtained: The global and local data agree relatively well; there are distinct differences between the radial profiles and bubble size distributions between the two main flow regimes; the local information identifies why the predictions of published models, which account for the smaller and larger bubbles in the flow, may not perform well; the modelling approaches based on the hindrance and enhancement concepts prove to be suitable for the flow regime identification and description, including the transition range between the homogeneous and heterogeneous flows; based on the hydrodynamics, the specific interfacial area is obtained, together with the mass transfer coefficient.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/LD13018" target="_blank" >LD13018: Interfacial properties, their diagnostics and their effects on macroscopic flows</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

—

Volume of the periodical

288

Issue of the periodical within the volume

MAR 15

Country of publishing house

CH - SWITZERLAND

Number of pages

16

Pages from-to

489-504

UT code for WoS article

000370085900051

EID of the result in the Scopus database

2-s2.0-84956989916