Tuning of regimes during two-phase flow through a cross-junction

Boruah, Manash Protim and Sarker, Anik and Randive, Pitambar R. and Pati, Sukumar and Sahu, Kirti Chandra (2021) Tuning of regimes during two-phase flow through a cross-junction. Physics of Fluids, 33 (12). pp. 1-15. ISSN 1070-6631

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We investigate the dynamics of two immiscible fluids in a cross-junction via three-dimensional numerical simulations using the volume of fluid approach to track the dispersed phase's evolution. Different regimes, namely the dripping, squeezing, and jetting dynamics, have been observed for different dimensionless parameters, and we unveil a transition in regimes due to the concomitant interplay of capillarity, viscosity, and wettability. Our results reveal that hydrophobic channel surfaces favor a transition from squeezing to dripping behavior at a lower value of the capillary number. Moreover, higher viscosity ratios advance the process of squeezing, necking, and breakage on hydrophobic surfaces. A wettability-capillarity regime map is also presented that will have significant implications regarding the choice of substrate wettability, fluid properties, and flow rate in droplet dispensing devices. © 2021 Author(s).

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IITH Creators:
IITH CreatorsORCiD
Sahu, Kirti Chandrahttp://orcid.org/0000-0002-7357-1141
Item Type: Article
Uncontrolled Keywords: Cross junction; Dimensionless parameters; Dispersed phasis; Flowthrough; Hydrophobics; Immiscible fluids; Phase evolutions; Three-dimensional numerical simulations; Two phases flow; Volume of fluids
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 06 Oct 2022 12:52
Last Modified: 06 Oct 2022 12:52
URI: http://raiith.iith.ac.in/id/eprint/10822
Publisher URL: http://doi.org/10.1063/5.0071743
OA policy: https://v2.sherpa.ac.uk/id/publication/9872
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