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Licensed Unlicensed Requires Authentication Published by De Gruyter February 22, 2021

Gas-liquid downward flow through narrow vertical conduits: effect of angle of entry and tube-diameter on flow patterns

  • Amit Kumar ORCID logo EMAIL logo , Gargi Das , Subhabrata Ray , Jay Mant Jha , Amit K. Thakur ORCID logo and Swapna Rekha Panda

Abstract

The present study investigates the flow pattern characteristics of air-water co-current down-flow in millichannels. The experiments have been performed in glass tube of diameter 0.0042 and 0.008 m. The fluids are injected through Y entry the included angle between the Y arms being 45°, 90°, 135°, and 180° (T Entry). The investigation reveals that the flow patterns are function of tube-diameter, and angle of fluid entry. Interestingly, stratified flow has been observed for steeper Y entry section at low liquid flow rates.


Corresponding author: Amit Kumar, Department of Chemical Engineering, Institute of Technology, Nirma University Ahmedabad, Ahmedabad, India, E-mail:

Notation
D

diameter of conduit

J

Superficial velocity

S

Interfacial area

U

In situ velocity

Eo

Eotvos number

Re

Reynolds number

Greek symbols
ρ

Density

σ

Surface tension

Subscripts and superscripts
G

Gas

L

Liquid

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-09-03
Accepted: 2020-12-05
Published Online: 2021-02-22

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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