With a novel platform of bilayer polydimethylsiloxane microchannel formed by bifurcating junction, we aim to investigate droplet formation and fission in a multiphase system with complex three-dimensional (3D) structure and understand the variations in mechanism associated with droplet formation and fission in the microstructure between shear-thinning/Newtonian system versus Newtonian/Newtonian system. The investigation concentrates on shear-thinning fluid because it is one of the most ubiquitous rheological properties of non-Newtonian fluids. Sodium carboxymethyl cellulose (CMC) solution and silicone oil have been used as model fluids and numerical model has been established to characterize the shear-thinning effect in formation of CMC-in-oil emulsions, as well as breakup dynamics when droplets flow through 3D bifurcating junction. The droplet volume and generation rate have been compared between two systems at the same Weber number and capillary number. Variation in droplet fission has been found between two systems, demonstrating that the shear-thinning property and confining geometric boundaries significantly affect the deformation and breakup of each mother droplet into two daughter droplets at bifurcating junction. The understanding of the droplet fission in the novel microstructure will enable more versatile control over the emulsion formation and fission when non-Newtonian fluids are involved. The model systems in the study can be further developed to investigate the mechanical property of emulsion templated particles such as drug encapsulated microcapsules when they flow through complex media structures, such as blood capillaries or the porous tissue structure, which feature with bifurcating junction.
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Droplet Formation and Fission in Shear-Thinning/Newtonian Multiphase System Using Bilayer Bifurcating Microchannel
Yong Ren,
Yong Ren
Mem. ASME
Department of Mechanical, Materials and
Manufacturing Engineering,
Research Centre for Fluids and
Thermal Engineering,
University of Nottingham Ningbo China, 199
Taikang East Road,
Ningbo 315100, China
e-mail: yong.ren@nottingham.edu.cn
Department of Mechanical, Materials and
Manufacturing Engineering,
Research Centre for Fluids and
Thermal Engineering,
University of Nottingham Ningbo China, 199
Taikang East Road,
Ningbo 315100, China
e-mail: yong.ren@nottingham.edu.cn
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Kai Seng Koh,
Kai Seng Koh
School of Engineering and Physical Sciences,
Heriot-Watt University Malaysia,
No. 1 Jalan Venna P5/2,
Precinct 5,
Putrajaya 62200, Malaysia
e-mail: k.koh@hw.ac.uk
Heriot-Watt University Malaysia,
No. 1 Jalan Venna P5/2,
Precinct 5,
Putrajaya 62200, Malaysia
e-mail: k.koh@hw.ac.uk
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Jit Kai Chin,
Jit Kai Chin
Department of Chemical and
Environmental Engineering,
University of Nottingham Malaysia Campus,
1816, West Street, Jinjang North,
Jalan Broga,
Semenyih 43500, Selangor, Malaysia
e-mail: jit-kai.chin@nottingham.edu.my
Environmental Engineering,
University of Nottingham Malaysia Campus,
1816, West Street, Jinjang North,
Jalan Broga,
Semenyih 43500, Selangor, Malaysia
e-mail: jit-kai.chin@nottingham.edu.my
Search for other works by this author on:
Jing Wang,
Jing Wang
Department of Electrical and
Electronic Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: jing.wang@nottingham.edu.cn
Electronic Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: jing.wang@nottingham.edu.cn
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Conghua Wen,
Conghua Wen
School of Mathematical Sciences,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: alan.wen@nottingham.edu.cn
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: alan.wen@nottingham.edu.cn
Search for other works by this author on:
Yuying Yan
Yuying Yan
Research Centre for Fluids and
Thermal Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China;
Research Group of Fluids and Thermal
Engineering,
Faculty of Engineering,
University of Nottingham,
Nottingham NG7 2RD, UK
e-mail: yuying.yan@nottingham.ac.uk
Thermal Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China;
Research Group of Fluids and Thermal
Engineering,
Faculty of Engineering,
University of Nottingham,
Nottingham NG7 2RD, UK
e-mail: yuying.yan@nottingham.ac.uk
Search for other works by this author on:
Yong Ren
Mem. ASME
Department of Mechanical, Materials and
Manufacturing Engineering,
Research Centre for Fluids and
Thermal Engineering,
University of Nottingham Ningbo China, 199
Taikang East Road,
Ningbo 315100, China
e-mail: yong.ren@nottingham.edu.cn
Department of Mechanical, Materials and
Manufacturing Engineering,
Research Centre for Fluids and
Thermal Engineering,
University of Nottingham Ningbo China, 199
Taikang East Road,
Ningbo 315100, China
e-mail: yong.ren@nottingham.edu.cn
Kai Seng Koh
School of Engineering and Physical Sciences,
Heriot-Watt University Malaysia,
No. 1 Jalan Venna P5/2,
Precinct 5,
Putrajaya 62200, Malaysia
e-mail: k.koh@hw.ac.uk
Heriot-Watt University Malaysia,
No. 1 Jalan Venna P5/2,
Precinct 5,
Putrajaya 62200, Malaysia
e-mail: k.koh@hw.ac.uk
Jit Kai Chin
Department of Chemical and
Environmental Engineering,
University of Nottingham Malaysia Campus,
1816, West Street, Jinjang North,
Jalan Broga,
Semenyih 43500, Selangor, Malaysia
e-mail: jit-kai.chin@nottingham.edu.my
Environmental Engineering,
University of Nottingham Malaysia Campus,
1816, West Street, Jinjang North,
Jalan Broga,
Semenyih 43500, Selangor, Malaysia
e-mail: jit-kai.chin@nottingham.edu.my
Jing Wang
Department of Electrical and
Electronic Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: jing.wang@nottingham.edu.cn
Electronic Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: jing.wang@nottingham.edu.cn
Conghua Wen
School of Mathematical Sciences,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: alan.wen@nottingham.edu.cn
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China
e-mail: alan.wen@nottingham.edu.cn
Yuying Yan
Research Centre for Fluids and
Thermal Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China;
Research Group of Fluids and Thermal
Engineering,
Faculty of Engineering,
University of Nottingham,
Nottingham NG7 2RD, UK
e-mail: yuying.yan@nottingham.ac.uk
Thermal Engineering,
University of Nottingham Ningbo China,
199 Taikang East Road,
Ningbo 315100, China;
Research Group of Fluids and Thermal
Engineering,
Faculty of Engineering,
University of Nottingham,
Nottingham NG7 2RD, UK
e-mail: yuying.yan@nottingham.ac.uk
1Corresponding author.
Presented at the 5th ASME 2016 Micro/Nanoscale Heat & Mass Transfer International Conference. Paper No. MNHMT2016-6709.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 26, 2016; final manuscript received March 23, 2017; published online October 4, 2017. Assoc. Editor: Chun Yang.
J. Heat Transfer. Jan 2018, 140(1): 012405 (7 pages)
Published Online: October 4, 2017
Article history
Received:
May 26, 2016
Revised:
March 23, 2017
Citation
Ren, Y., Seng Koh, K., Kai Chin, J., Wang, J., Wen, C., and Yan, Y. (October 4, 2017). "Droplet Formation and Fission in Shear-Thinning/Newtonian Multiphase System Using Bilayer Bifurcating Microchannel." ASME. J. Heat Transfer. January 2018; 140(1): 012405. https://doi.org/10.1115/1.4037338
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