A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method

Droplet splitting as a significant feature of droplet-based microfluidic systems has been widely employed in biotechnology, biomedical engineering, tissue engineering, and it has been preferred over continuous flow systems. In the present paper, two-dimensional numerical simulations have been done t...

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Autores principales:	Mohammad Raad, Sajad Rezazadeh, Habib Jalili, Davod Abbasinezhad Fallah
Formato:	article
Lenguaje:	EN
Publicado:	SAGE Publishing 2021
Materias:	Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/d98fd39852ad4e4aa3640f81fc84831f
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spelling	oai:doaj.org-article:d98fd39852ad4e4aa3640f81fc84831f2021-11-15T00:33:37ZA numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method1687-814010.1177/16878140211045487https://doaj.org/article/d98fd39852ad4e4aa3640f81fc84831f2021-11-01T00:00:00Zhttps://doi.org/10.1177/16878140211045487https://doaj.org/toc/1687-8140Droplet splitting as a significant feature of droplet-based microfluidic systems has been widely employed in biotechnology, biomedical engineering, tissue engineering, and it has been preferred over continuous flow systems. In the present paper, two-dimensional numerical simulations have been done to examine the asymmetrical droplet splitting process. The two-phase level set method (LSM) has been predicted to analyze the mechanism of droplet formation and droplet splitting in immiscible liquid/liquid two-phase flow in the branched T-junction microchannel. Governing equations on flow field have been discretized and solved using finite element-based COMSOL Multiphysics software (version 5.3a). Obtained numerical results were validated by experimental data reported in the literature which show acceptable agreement. The model was developed to simulate the mechanism of droplet splitting at the branched T-junction microchannel. This study provides a passive technique to asymmetrically split up microdroplets at the downstream T-junctions. The results show that outlet branches’ pressure gradient affects the droplet splitting. Specifically, it has been shown that the splitting ratio increases by increasing the length ratio, and equal droplet splitting can be achieved where the ratio is L L / L u = 1. We have used two outlet branches having the same width but different lengths to create the required pressure gradient. As the length ratio of the outlet branches increases, the diameter ratio increases as well.Mohammad RaadSajad RezazadehHabib JaliliDavod Abbasinezhad FallahSAGE PublishingarticleMechanical engineering and machineryTJ1-1570ENAdvances in Mechanical Engineering, Vol 13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Mechanical engineering and machinery TJ1-1570
spellingShingle	Mechanical engineering and machinery TJ1-1570 Mohammad Raad Sajad Rezazadeh Habib Jalili Davod Abbasinezhad Fallah A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method
description	Droplet splitting as a significant feature of droplet-based microfluidic systems has been widely employed in biotechnology, biomedical engineering, tissue engineering, and it has been preferred over continuous flow systems. In the present paper, two-dimensional numerical simulations have been done to examine the asymmetrical droplet splitting process. The two-phase level set method (LSM) has been predicted to analyze the mechanism of droplet formation and droplet splitting in immiscible liquid/liquid two-phase flow in the branched T-junction microchannel. Governing equations on flow field have been discretized and solved using finite element-based COMSOL Multiphysics software (version 5.3a). Obtained numerical results were validated by experimental data reported in the literature which show acceptable agreement. The model was developed to simulate the mechanism of droplet splitting at the branched T-junction microchannel. This study provides a passive technique to asymmetrically split up microdroplets at the downstream T-junctions. The results show that outlet branches’ pressure gradient affects the droplet splitting. Specifically, it has been shown that the splitting ratio increases by increasing the length ratio, and equal droplet splitting can be achieved where the ratio is L L / L u = 1. We have used two outlet branches having the same width but different lengths to create the required pressure gradient. As the length ratio of the outlet branches increases, the diameter ratio increases as well.
format	article
author	Mohammad Raad Sajad Rezazadeh Habib Jalili Davod Abbasinezhad Fallah
author_facet	Mohammad Raad Sajad Rezazadeh Habib Jalili Davod Abbasinezhad Fallah
author_sort	Mohammad Raad
title	A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method
title_short	A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method
title_full	A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method
title_fullStr	A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method
title_full_unstemmed	A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method
title_sort	numerical study of droplet splitting in branched t-shaped microchannel using the two-phase level-set method
publisher	SAGE Publishing
publishDate	2021
url	https://doaj.org/article/d98fd39852ad4e4aa3640f81fc84831f
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A numerical study of droplet splitting in branched T-shaped microchannel using the two-phase level-set method

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