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Unsteady behaviour of bubble column in homogeneous flow regime: Startup and shutdown
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SYSNO ASEP 0572103 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Unsteady behaviour of bubble column in homogeneous flow regime: Startup and shutdown Author(s) Růžička, Marek (UCHP-M) RID, ORCID, SAI
Orvalho, Sandra (UCHP-M) RID, ORCID, SAIArticle number 118806 Source Title Chemical Engineering Science. - : Elsevier - ISSN 0009-2509
Roč. 277, AUG 5 (2023)Number of pages 14 s. Language eng - English Country GB - United Kingdom Keywords bubble column ; engagement ; disengagement OECD category Chemical process engineering R&D Projects GA19-09518S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access with time embargo (06.08.2025) Institutional support UCHP-M - RVO:67985858 UT WOS 001008739100001 EID SCOPUS 85159422926 DOI 10.1016/j.ces.2023.118806 Annotation The startup (engagement, EN) and shutdown (disengagement, DE) processes in the bubble column are investigated both experimentally and theoretically. Two horizontal interfaces, top and bottom, characterize the evolving bubble bed. Their motion is explored by measurements in a laboratory air–water bubble column operated in the homogeneous flow regime (HoR). The effect of two control parameters is determined: clear liquid height L and gas superficial velocity q. The following results are obtained: the trajectories of the top and bottom interfaces, the duration of the early and late stages of EN, the coordinate points of the typical events of the bubble bed dynamics, the bubble swarm velocities related to the interfaces, the characteristic time scales, the symmetry features of EN and DE processes, the parametric dependence on L and q. A simple mathematical model is suggested to describe and interpret the experimental data.
Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2024 Electronic address https://hdl.handle.net/11104/0342929
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