Entropy Generation on Pulsatile Hydromagnetic Flow of Jeffrey Nanofluid in a Porous Channel with Brownian Motion, Thermophoresis, and Heat Source/Sink Using Cattaneo-Christov Heat Flux

Thamizharasan, T ; Anala, Subramanyam Reddy

Abstract

In this work, the entropy generation on MHD pulsatile flow of Jeffrey nanofluid in a porous channel with Cattaneo-Christov theory is investigated. Buongiorno nanofluid model is utilized to see the impact of thermophoresis and Brownian motion. The consequences of thermal radiation, heat source/sink, viscous dissipation, and Ohmic heating are considered. The governing equations are transformed to a system of ordinary differential equations by applying the perturbation procedure then numerically tackled with fourth-order Runge-Kutta scheme aided by shooting technique. The influences of different emerging parameters and variables on velocity, temperature, nanoparticles concentration, entropy generation, and Bejan number are presented graphically. The influence of emerging parameters on heat and mass transfer rates are prearranged in table. The temperature of nanofluid increases with an enhancement in Eckert number, thermophoretic, and Brownian movements, whereas it decelerates for the rising values of cross flow Reynolds number. The concentration of nanoparticles diminishes with an increment in the Lewis number, chemical reaction parameter, and Brownian motion parameter whereas it improves with a rise in thermophoresis parameter. The entropy generation is an increasing function of Eckert number and radiation parameter. Further, the Bejan number is enhanced for increasing the values of Hartmann number.


Keyword(s)

Jeffrey nanofluid; pulsatile flow; entropy generation; Cattaneo-Christov heat flux; Brownian motion; thermophoresis

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