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ORIGINAL PAPER
Transient Velocity And Steady State Entropy Generation In A Microfluidic Couette Flow Containing Charged Nano Particles
1
Department of Mechanical Engineering, Cleveland State University, Cleveland, Ohio-44115, USA
2
Department of Mechanical Engineering, Cleveland State University, Cleveland, Ohio-44115, USA; Department of Studies and Research in Mathematics, Kuvempu University, Shankarghatta 577451, Shimoga, Karnataka, INDIA
Online publication date: 2015-12-10
Publication date: 2015-12-01
International Journal of Applied Mechanics and Engineering 2015;20(4):787-804
KEYWORDS
transient velocitysteady state entropy generationmicrofluidic Couette flowcharged nanoparticlesBejan number and Brinkman number
ABSTRACT
An analysis has been provided to determine the transient velocity and steady state entropy generation in a microfluidic Couette flow influenced by electro-kinetic effect of charged nanoparticles. The equation for calculating the Couette flow velocity profile is derived for transient flow. The solutions for momentum and energy equations are used to get the exact solution for the dimensionless velocity ratio and dimensionless entropy generation number. The effects of the dimensionless entropy generation number, Bejan number, irreversibility ratio, entropy generation due to fluid friction and due to heat transfer on dimensionless time, relative channel height, Brinkman number, dimensionless temperature ratio, nanoparticle volume fraction are analyzed.
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