Homogeneous-Heterogeneous Regime Transition in Bubble Columuns.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F01%3A27013058" target="_blank" >RIV/67985858:_____/01:27013058 - 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

Homogeneous-Heterogeneous Regime Transition in Bubble Columuns.

Original language description

A simple physical model for homogeneous-heterogeneous regime transition in bubble columns is developed. The model is based on hydrodynamic coupling between gas and liquid phases. For the homogeneous regime, the coupling is made via bubble drift concept (Darwin, Proc. Camb. Phil. Soc. 49 (1953) 342). As a byproduct, a novel non-empirical formula for bubble slip velocity results, u/w=1ae/(1e). For the heterogeneous regime, the coupling is obtained in a simple formal way, recovering the classical result ofZuber and Findlay. The regime transition is considered as a smooth and gradual process characterized by a transition function. The model has five parameters: two terminal bubble velocities, bubble drift coefficient, Zuber-Findlay constant, and intermittency factor. All have clear physical meaning and are extractable from experimental data. The model gives formulas for the voidage-gas flow rate dependence separately for the homogeneous regime, heterogeneous regime and transition regime.

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/GA104%2F98%2F1435" target="_blank" >GA104/98/1435: Hydrodynamic instabilities in bubble column reactors</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2001

Confidentiality

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

Name of the periodical

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

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Volume of the periodical

56

Issue of the periodical within the volume

15

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

4609-4626

UT code for WoS article

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EID of the result in the Scopus database

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