Entropy Analysis on Electro-Kinetically Modulated Peristaltic Propulsion of Magnetized Nanofluid Flow through a Microchannel

Muhammad Bhatti,Ahmed Zeeshan,Mohsen Sheikholeslami

doi:10.3390/e19090481

Abstract

A theoretical and a mathematical model is presented to determine the entropy generation on electro-kinetically modulated peristaltic propulsion on the magnetized nanofluid flow through a microchannel with joule heating. The mathematical modeling is based on the energy, momentum, continuity, and entropy equation in the Cartesian coordinate system. The effects of viscous dissipation, heat absorption, magnetic field, and electrokinetic body force are also taken into account. The electric field terms are helpful to model the electrical potential terms by means of Poisson–Boltzmann equations, ionic Nernst–Planck equation, and Debye length approximation. A perturbation method has been applied to solve the coupled nonlinear partial differential equations and a series solution is obtained up to second order. The physical behavior of all the governing parameters is discussed for pressure rise, velocity profile, entropy profile, and temperature profile.

Highlights

During the recent few decades, Nanotechnology has received a remarkable attention due to its numerous applications in industry, since material containing nano-sized particles exhibits various chemical and unique physical features
Nanofluid consists of nano-sized particles in different Newtonian and non-Newtonian fluid such as water, ethylene glycol, and oil
A new way to enhance the thermal conductivity of such type of fluids is by adding nano-sized particles in the base fluids to form slurries

Summary

Introduction

During the recent few decades, Nanotechnology has received a remarkable attention due to its numerous applications in industry, since material containing nano-sized particles exhibits various chemical and unique physical features. Nanofluid heat transfer is very much favorable to enhance the heat transfer and thermal conductivity of the fluid up to 40%. Nanofluid consists of nano-sized particles (diameter: 1–100 nm) in different Newtonian and non-Newtonian fluid such as water, ethylene glycol, and oil. Most of the fluids have low thermal conductivity and they are unable to match today’s need of cooling rate. For this purpose, a new way to enhance the thermal conductivity of such type of fluids is by adding nano-sized particles in the base fluids (water) to form slurries. Nanofluid has become the major attention of various researchers for the new manufacturing of automotive and plant cooling systems, and for transfer of heat in different heat exchanger devices.

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