Entropy Generation in MHD Radiative Flow of CNTs Casson Nanofluid in Rotating Channels with Heat Source/Sink

Poom Kumam,Haroon Ur Rasheed,Saeed Islam,Zahir Shah,Abdullah Dawar

doi:10.1155/2019/9158093

Abstract

We presented the applications of entropy generation for SWCNTs and MWCNTs based on kerosene oil for Casson nanofluid flow by rotating channels. Kerosene oil has advanced thermal conductivity and exclusive features and has a lot of practical uses due to its unique behavior. That is why we have used kerosene oil as a based fluid. For the entropy generation second law of thermodynamics is applied and implemented for the nanofluid transport mechanism. In the presence of magnetic field, the effects of thermal radiations and heat source/sink on the temperature profiles are studied. The fluid flow is supposed in steady state. With the help of suitable similitude parameters, the leading equations have been transformed to a set of differential equations. The solution of the modeled problem has been carried out with the homotopic approach. The physical properties of carbon nanotubes are shown through tables. The effects of the imbedded physical parameters on the velocities, temperature, entropy generation rate, and Bejan number profiles are investigated and presented through graphs. Moreover, the impact of significant parameters on surface drag force and heat transfer rate is tabulated.

Highlights

Nanofluid is the potential heat transfer fluid which is one of the fundamental fragments of nanotechnology
We presented the applications of entropy generation for single-walled carbon nanotubes (SWCNTs) and multiwalled carbon nanotubes (MWCNTs) based on kerosene oil for Casson nanofluid flow by rotating channels
From here it is observed that the heat transfer rate increases with the escalation in (Re) and (γ) while it reduces with the escalation in (Rd) and (Pr)

Summary

Introduction

Nanofluid is the potential heat transfer fluid which is one of the fundamental fragments of nanotechnology. Are the applications of carbon nanotubes (CNTs). These applications got the researchers attention to work on CNTs. Choi [1] has presented the idea of nanofluids for the first time by dipping the nanometer sized particle into the base fluid. The single-walled carbon nanotubes (SWCNTs) have higher heat transfer rate and surface drag force than multiwalled carbon nanotubes (MWCNTs) reported by Haq et al [2]. Liu et al [3] studied the synthetic engine oil and ethylene glycol in the presence of MWCNTs. Liu et al [3] studied the synthetic engine oil and ethylene glycol in the presence of MWCNTs They claimed that ethylene glycol with CNTs has higher thermal conductivity.

Results

Discussion

Conclusion