Abstract
Applying an electric field to a two-fluid flow in a microchannel is an effective way to obtain microdroplets. For that purpose, the stability of the interface between a Newtonian and a power-law fluid flowing in a microchannel is studied. The fluids are either leaky dielectric or perfect dielectric. The effects of the applied voltage, the power-law index, and the strength of the base flow are investigated. Increasing the voltage may destabilize or stabilize the system depending on the electrical properties of the leaky dielectric fluids, similar to a system of two Newtonian fluids. When the electric field destabilizes the system, the maximum wavenumber increases, representing a droplet volume decrease. For perfect dielectric fluids, the electric field permanently stabilizes the flow independent of the electrical properties of fluids. The stability behavior of the power-law index depends on the fluids’ thickness ratio. When the power-law index is added as a new parameter, the base flow strength also affects the system stability, even when the thickness and viscosity ratios are unity, unlike two Newtonian fluid system. Depending on the fluids’ power-law index, and viscosity ratio, the base flow strength may stabilize or destabilize the system. Additionally, a sudden decrease in the droplet volume may be observed for some values of the power-law index and viscosity ratios.
Similar content being viewed by others
Data availability statement
This manuscript has no associated data or the data will not be deposited. [Authors’ comment: Data sharing not applicable to this article as no datasets were generated or analysed during the current study.]
References
G.M. Whitesides, The origins and the future of microfluidics. Nature 442(7101), 368–373 (2006)
S. Altundemir, A.K. Uguz, K. Ulgen, A review on wax printed microfluidic paper-based devices for international health. Biomicrofluidics 11(4), 041501 (2017)
P. Eribol, A.K. Uguz, K. Ulgen, Screening applications in drug discovery based on microfluidic technology. Biomicrofluidics 10(1), 011502 (2016)
M. R. Bringer, C. J. Gerdts, H. Song, J. D. Tice, R. F. Ismagilov, Microfluidic systems for chemical kinetics that rely on chaotic mixing in droplets. Philos. Trans. A Math. Phys. Eng. Sci. 362(1818), 1087–1104 (2004)
D. T. Chiu, A. J. DeMello, D. D. Carlo, P. S. Doyle, C. Hansen, R. M. Maceiczyk, R. C. Wootton, Small but perfectly formed? Successes, challenges, and opportunities for microfluidics in the chemical and biological sciences. Chem 2(2), 201–223 (2017)
D.J. Collins, A. Neild, A. DeMello, A.Q. Liu, Y. Ai, The Poisson distribution and beyond: methods for microfluidic droplet production and single cell encapsulation. Lab. Chip. 15(17), 3439–3459 (2015)
J. R. Millman, K. H. Bhatt, B. G. Prevo, O. D. Velev, Anisotropic particle synthesis in dielectrophoretically controlled microdroplet reactors. Nat. Mater. 4(1), 98–102 (2005)
G. T. Vladisavljević, N. Khalid, M. A. Neves, T. Kuroiwa, M. Nakajima, K. Uemura, S. Ichikawa, I. Kobayashi, Industrial lab-on-a-chip: Design, applications and scale-up for drug discovery and delivery, Adv. Drug Deliv. Rev. 65(11–12), 1626–1663 (2013)
S. Altundemir, P. Eribol, A.K. Uguz, Droplet formation and its mechanism in a microchannel in the presence of an electric field. Fluid Dyn. Res. 50(5), 051404 (2018)
O. Ozen, N. Aubry, D.T. Papageorgiou, P.G. Petropoulos, Monodisperse drop formation in square microchannels. Phys. Rev. Lett. 96(14), 144501 (2006)
P. Eribol, A.K. Uguz, Experimental investigation of electrohydrodynamic instabilities in micro channels. Eur. Phys. J. Special Topics 224(2), 425–434 (2015)
H. Li, T.N. Wong, N.T. Nguyen, Instability of pressure driven viscous fluid streams in a microchannel under a normal electric field. Int. J. Heat Mass Tran. 55(23–24), 6994–7004 (2012)
D. Saville, Electrohydrodynamics: The Taylor-Melcher leaky dielectric model. Annu. Rev. Fluid Mech. 29(1), 27–64 (1997)
C.T. Okonski, H.C. Thacher, The distortion of aerosol droplets by an electric field. J. Phys. Chem. Biophys. 57(9), 955–958 (1953)
R. S. Allan, S. G. Mason, Particle behaviour in shear and electric fields, 1. Deformation and burst of fluid drops. Proc. R. Soc. Lond. A Math. Phys. Sci. 267(1328), 45–61 (1962)
B. Dinesh, R. Narayanan, Nature of branching in electrohydrodynamic instability. Phys. Rev. Fluids 6(5), 054001 (2021)
J. R. Melcher, W. J. Schwarz, Interfacial relaxation overstability in a tangential electric-field. Phys. Fluids 11(12), 2604–2616 (1968)
D. Tseluiko, D.T. Papageorgiou, Nonlinear dynamics of electrified thin liquid films. Siam J. On Appl. Math. 67(10), 1310–1329 (2006)
V. Shankar, A. Sharma, Instability of the interface between thin fluid films subjected to electric fields. J. Colloid Interface Sci. 274(1), 294–308 (2004)
G. I. Taylor, Studies in electrohydrodynamics. I. The circulation produced in a drop by an electric field. Proc. R. Soc. Lond. A 291(1425), 159–166 (1966)
J. R. Melcher, G. I. Taylor, Electrohydrodynamics: a review of role of interfacial shear stresses. Annu. Rev. Fluid Mech. 1(1), 111–146 (1969)
O. Ozen, N. Aubry, D.T. Papageorgiou, P.G. Petropoulos, Electrohydrodynamic linear stability of two immiscible fluids in channel flow. Electrochim. Acta 51(25), 5316–5323 (2006)
A. K. Uguz, O. Ozen, N. Aubry, Electric field effect on a two-fluid interface instability in channel flow for fast electric times. Phys. Fluids 20(3), 031702 (2008)
A. K. Uguz, N. Aubry, Quantifying the linear stability of a flowing electrified two-fluid layer in a channel for fast electric times. Phys. Fluids 20(9), 092103 (2008)
S. C. Ozan, A. K. Uguz, Nonlinear evolution of the interface between immiscible fluids in a micro channel subjected to an electric field. Eur. Phys. J. Special Topics 226(6), 1207–1218 (2017)
S. I. Kaykanat, A. K. Uguz, The linear stability between a Newtonian and a power-law fluid under a normal electric field. J. Nonnewton. Fluid Mech. 277, 104220 (2020)
M. Firouznia, D. Saintillan, Electrohydrodynamic instabilities in freely suspended viscous films under normal electric fields. Phys. Rev. Fluids 6(10), 103703 (2021)
N. T. Eldabe, Electrohydrodynamic stability of two superposed elastoviscous liquids in plane couette-flow. J. Math. Phys. 28(11), 2791–2800 (1987)
G. Ersoy, A. K. Uguz, Electro-hydrodynamic instability in a microchannel between a Newtonian and a non-Newtonian liquid. Fluid Dyn. Res. 44(3), 031406 (2012)
P. Eribol, S. I. Kaykanat, S. C. Ozan, A. K. Uguz, Electrohydrodynamic instability between three immiscible fluids in a microchannel: lubrication analysis. Microfluid. Nanofluid. 26(2), 1–26 (2022)
J. D. Zahn, V. Reddy, Two phase micromixing and analysis using electrohydrodynamic instabilities. Microfluid. Nanofluid, 2(5), 399–415 (2006)
R.M. Thaokar, V. Kumaran, Electrohydrodynamic instability of the interface between two fluids confined in a channel. Phys. Fluids 17(8), 084104 (2005)
R.V. Craster, O.K. Matar, Electrically induced pattern formation in thin leaky dielectric films. Phys. Fluids 17(3), 032104 (2005)
A. Nurocak, A. K. Uguz, Effect of the direction of the electric field on the interfacial instability between a passive fluid and a viscoelastic polymer. Eur. Phys. J. Special Topics 219(1), 99–110 (2013)
D. T. Papageorgiou, P. G. Petropoulos, Generation of interfacial instabilities in charged electrified viscous liquid films.J. Eng. Math. 50(2), 223–240 (2004)
L. Haiwang, W. Teck Neng, N. Nam-Trung, Electrohydrodynamic and shear-stress interfacial instability of two streaming viscous liquid inside a microchannel for tangential electric fields. Micro Nanosyst. 4(1), 14–24 (2012)
K. Zakaria, H. Kamel, Y. Gamiel, Instability of a viscous liquid sheet under the influence of a tangential electric field. Alex. Eng. J. 61(7), 5169–5181 (2022)
K. Savettaseranee, D.T. Papageorgiou, P.G. Petropoulos, B.S. Tilley, The effect of electric fields on the rupture of thin viscous films by van der Waals forces. Phys. Fluids 15(3), 641–652 (2003)
C. J. Petrie, M. M. Denn, Instabilities in polymer processing. AlChe J. 22(2), 209–236 (1976)
S. Y. Chou, L. Zhuang, L. Guo, Lithographically induced self-construction of polymer microstructures for resistless patterning. Appl. Phys. Lett. 75(7), 1004–1006 (1999)
K. Gautam, P.A.L. Narayana, K. C. Sahu, Linear instability driven by an electric field in two-layer channel flow of Newtonian and Herschel-Bulkley fluids. J. Nonnewton. Fluid Mech. 285, 104400 (2020)
Z. G. Su, T. F. Li, K. Luo, H. L. Yi, Nonlinear behavior of electrohydrodynamic flow in viscoelastic fluids. Phys. Rev. Fluids 6(9), 093701 (2021)
S. Moravec, D. Liepsch, Flow investigations in a model of a three-dimensional human artery with Newtonian and non-Newtonian fluids. Biorheology 20(6), 745–759 (1983)
D. Liepsch, S. T. Moravec, Pulsatile flow of non-Newtonian fluid in distensible models of human arteries. 21(4), 571–586 (1984)
H. A. Stone, Introduction to fluid dynamics for microfluidic flows, CMOS Biotechnol. 5–30 (2007)
H. Bruus, Theoretical microfluidics. (Oxford University Press, 2007), p 18
R. Gupta, D.F. Fletcher, B.S. Haynes, Taylor flow in microchannels: a review of experimental and computational work. J. Comput. Multiph. Flows. 2(1), 1–31 (2010)
A. Günther, K. F. Jensen, Multiphase microfluidics: from flow characteristics to chemical and materials synthesis. Lab Chip 6(12), 1487–1503 (2006)
L. E. Johns, R. Narayanan, Interfacial Instability. (Springer Science and Business Media, 2007)
D. T. Papageorgiou, Film flows in the presence of electric fields. Annu. Rev. Fluid Mech. 51, 155–187 (2019)
D. Picchi, I. Barmak, A. Ullmann, N. Brauner, Stability of stratified two-phase channel flows of Newtonian/non-Newtonian shear-thinning fluids. Int. J. Multiph. Flow 99, 111–131 (2018)
C. Nouar, I. Frigaard, Stability of plane Couette-Poiseuille flow of shear-thinning fluid. Phys. Fluids 21(6), 064104 (2009)
K. C. Sahu, P. Valluri, P. D. M. Spelt, O. K. Matar, Linear instability of pressure-driven channel flow of a Newtonian and a Herschel-Bulkley fluid. Phys. Fluids 19(12), 122101 (2007)
W. Guo, G. Labrosse, R. Narayanan, The application of the Chebyshev-spectral method in transport phenomena. (Springer Science & Business Media, 2013)
X. S. Jiang, L. H. Qi, J. Luo, X. H. Zeng, Influences of disturbance frequency on the droplet generation for microdroplet deposition manufacture. Proc. Inst. Mech. Eng. B J. Eng. Manufact. 223(12), 1529–1539 (2009)
C. S. Yih, Instability due to viscosity stratification. J. Fluid Mech. 27(2), 337–352 (1967)
Acknowledgements
We acknowledge financial support provided by TÜBİTAK through project No. 116M374.
Author information
Authors and Affiliations
Corresponding authors
Additional information
IMA10 - Interfacial Fluid Dynamics and Processes. Guest editors: Rodica Borcia, Sebastian Popescu, Ion Dan Borcia.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Kaykanat, S.I., Uguz, A.K. Effect of parallel electric field on the linear stability between a Newtonian and a power-law fluid in a microchannel. Eur. Phys. J. Spec. Top. 232, 385–394 (2023). https://doi.org/10.1140/epjs/s11734-023-00788-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjs/s11734-023-00788-7