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[期刊论文]

Geometry effect on the mass transfer of slug flow in the microchannels with periodic expansion units

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author:

Han, Yang (Han, Yang.) [1] | Wang, Xiaoda (Wang, Xiaoda.) [2] (Scholars:王晓达) | Yin, Yaran (Yin, Yaran.) [3]

Indexed by:

EI Scopus SCIE

Abstract:

Although it was experimentally verified the microchannels with periodic expansion structures can effectively intensify the mass transfer of the slug flow, little research has focused on their geometric design. Hereon, a numerical simulation is conducted to evaluate the impact of microchannel geometry on the mass transfer of slug flow. The square expansion unit performs better than the triangular and circular ones. With the increase of the length, width, and number of the expansion units, and the width of the constriction between the adjacent expansions, the mass transfer performance shows a non-monotonic variation, that is an initial increase followed by a decrease. The underlying reasons are analyzed by evaluating the mixing inside and outside the droplet and the effective mass transfer area. At the preliminarily optimized geometry, a novel mass transfer path, in which not only the droplet caps but also the droplet body becomes the effective mass transfer area, is observed.

Keyword:

Mass transfer intensification Numerical simulation Periodic expansion microchannel Slug flow Structure design

Community:

  • [ 1 ] [Han, Yang]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Wang, Xiaoda]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Yin, Yaran]Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou 310018, Peoples R China

Reprint 's Address:

  • [Wang, Xiaoda]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Fujian, Peoples R China;;[Yin, Yaran]Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou 310018, Peoples R China;;

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Source :

CHEMICAL ENGINEERING SCIENCE

ISSN: 0009-2509

Year: 2024

Volume: 299

4 . 1 0 0

JCR@2023

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

30 Days PV: 3

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