Analysis of EDL Effects on the Flow and Flow Stability in Microchannels

You, Xue-yi; Guo, Lixiang

doi:10.1016/s1001-6058(09)60109-8

Cited by 10 publications

(1 citation statement)

References 18 publications

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“…Ren and Li (2005) further developed a theoretical model of the EDL field to investigate the effects of EDL on pressure-driven flow in a microchannel. You and Guo (2010) studied the effects of EDL on the velocity distribution and the flow stability of the developed laminar flow in microchannels. Recently, Jing et al (2017) investigated fully developed pressure-driven flow in a microchannel with consideration of the combined effect of surface charge-induced EDL and surface charge-dependent slip.…”

Section: Introductionmentioning

confidence: 99%

Two-layer nanofluid flow and heat transfer in a horizontal microchannel with electric double layer effects and magnetic field

Zhao

Tao

2020

HFF

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Purpose The purpose of this paper is to investigate the immiscible two-layer heat fluid flows in the presence of the electric double layer (EDL) and magnetic field. The effects of EDL, magnetic field and the viscous dissipative term on fluid velocity and temperature, as well as the important physical quantities, are examined and discussed. Design/methodology/approach The upper and lower regions in a horizontal microchannel with one layer being filled with a nanofluid and the other with a viscous Newtonian fluid. The nanofluid flow in the lower layer is described by the Buongiorno’s nanofluid model with passively controlled model at the boundaries. An appropriate set of non-dimensional quantities are used to simplify the nonlinear systems. The resulting coupled nonlinear equations are solved by using homotopy analysis method. Findings The present work demonstrates that increasing the EDL thickness and Hartmann number can restrain the fluid flow. The Brinkmann number has a significant role in the enhancement of heat transfer. It is also identified that the influence of EDL effects on microflow cannot be ignored. Originality/value The effects of viscous dissipation involved in the heat transfer process and the body force because of the EDL and the magnetic field are considered in the thermal energy and momentum equations for both regions. The detailed derivation procedure of the analytical solution for electrostatic potential is provided. The analytical solutions can lead to improved understanding of the complex microfluidic systems.

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Section: Introductionmentioning

confidence: 99%