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Steady Flow of a Fluid Stream

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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

On controlling the flow behavior driven by induction electrohydrodynamics in microfluidic channels.

Yanbo Li¹, Yukun Ren^2,3, Weiyu Liu^1,2

¹School of Electronics and Control Engineering, Chang'an University, Xi'an, Shaanxi, P. R. China.

Electrophoresis

|January 10, 2017

Summary

This summary is machine-generated.

We developed a new electrohydrodynamics (EHD) model for microfluidic devices. This model enhances fluid flow control and pump performance in microchannels using traveling-wave voltage signals.

Keywords:

Induction electrohydrodynamics Microfluidic pump Smeared structural polarization Traveling wave

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Area of Science:

Physics
Fluid Dynamics
Microfluidics

Background:

Electrohydrodynamics (EHD) offers precise control over fluid motion.
Microfluidic devices require efficient and controllable fluid transport for various applications.
Existing EHD methods face challenges with dielectric breakdown and limited flow control.

Purpose of the Study:

To develop a nondimensional physical model for micro-scale fluid flow.
To demonstrate fluid flow driven by traveling-wave induction electrohydrodynamics (EHD).
To enhance pump flow rate and adjust flow anisotropy in microchannels without dielectric breakdown risks.

Main Methods:

Direct numerical simulation of fluid flow.
Application of synchronized traveling-wave voltage signals on double-sided electrode arrays.
Development of "mix-type", "superimposition-type", and "adjustable-type" device designs.

Main Results:

Evident improvement in pump performance.
Generation of diverse flow profiles: symmetrical, parabolic, plug-like, and highly anisotropic biased flow.
Controllable fluid motion facilitating on-demand transportation of bio-microfluidic samples.
Automatic conversion of pump flow direction by switching voltage waves.

Conclusions:

The proposed device designs significantly improve EHD pump performance and flow control flexibility.
The developed model provides a framework for on-chip bio-microfluidic sample manipulation.
Results offer guidelines for creating adaptable electrokinetic systems for microfluidic applications.