Mixing enhancement due to viscoelastic instability in serpentine microchannels at very large Weissenberg numbers

Nolan, Kevin; Agarwal, Akshat; Lei, Shenghui; Dalton, Eric

doi:10.1109/itherm.2016.7517564

2016 15th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm) 2016

DOI: 10.1109/itherm.2016.7517564

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Mixing enhancement due to viscoelastic instability in serpentine microchannels at very large Weissenberg numbers

Kevin Nolan¹,

Akshat Agarwal²,

Shenghui Lei³

et al.

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Cited by 2 publications

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“…They also completed on-chip erythrocytes lysis based on the efficient mixing effect. The erythrocytes are gradually lysed along the channel, leaving WBCs at the outlet.By employing the instability of a viscoelastic fluid with a lower viscosity, fluid mixing at subcritical Reynolds numbers was induced, thus the heat transfer in a serpentine channel was improved118 . Due to the low pumping cost of the fluid, it would be an attractive cooling method, which can be used in industrial applications such as next generation photonic devices for enhanced local hot-spot cooling.…”

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Recent progress of particle migration in viscoelastic fluids

et al. 2018

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Recently, research on particle migration in non-Newtonian viscoelastic fluids has gained considerable attention. In a viscoelastic fluid, three dimensional (3D) particle focusing can be easily realized in simple channels without the need for any external force fields or complex microchannel structures compared with that in a Newtonian fluid. Due to its promising properties for particle precise focusing and manipulation, this field has been developed rapidly, and research on the field has been shifted from fundamentals to applications. This review will elaborate the recent progress of particle migration in viscoelastic fluids, especially on the aspect of applications. The hydrodynamic forces on the micro/nano particles in viscoelastic fluids are discussed. Next, we elaborate the basic particle migration in viscoelasticity-dominant fluids and elasto-inertial fluids in straight channels. After that, a comprehensive review on the applications of viscoelasticity-induced particle migration (particle separation, cell deformability measurement and alignment, particle solution exchange, rheometry-on-a-chip and others) is presented; finally, we thrash out some perspectives on the future directions of particle migration in viscoelastic fluids.

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Recent progress of particle migration in viscoelastic fluids

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Nonlinear effects of viscoelastic fluid flows and applications in microfluidics: A review

Yuan

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Viscoelastic fluid naturally has both viscous and elastic properties. Therefore, there are two sources of nonlinear effects, namely inertial and elastic nonlinearities. The existence of elastic nonlinearity brings about various interesting flow phenomena in viscoelastic fluid flow, especially in microfluidics where the inertial nonlinearity can be negligible while the elastic nonlinearity can dominate the flow. Specifically, purely elasticity-induced instability and turbulence can occur in microchannels when the elastic nonlinearity is strong enough. Recently, those intriguing properties of viscoelastic fluid flow have motivated lots of researches on taking viscoelastic fluid as working fluid in different types of microfluidic devices, such as micro-mixers, micro heat exchangers, logic microfluidic circuits and particle manipulation. This paper aims to provide a state-of-the-art review of the nonlinear effect of viscoelastic fluids and its applications in the aforementioned microfluidic fields, which may provide a useful guidance for the researchers who are interested in this area.

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Mixing enhancement due to viscoelastic instability in serpentine microchannels at very large Weissenberg numbers

Cited by 2 publications

References 17 publications

Recent progress of particle migration in viscoelastic fluids

Recent progress of particle migration in viscoelastic fluids

Nonlinear effects of viscoelastic fluid flows and applications in microfluidics: A review

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