Entropy generation analysis of nanoliquid flow through microchannel considering heat source and different shapes of nanoparticle

2020

Heat Trans

Studies related to enhancing heat transfer has attained much attention of researchers to avail optimized heat-transfer devices. High viscous fluids are of great importance as they are widely used in petroleum products, organic chemistry, coating, printing, and so forth. In this study, heat transfer mechanism driven by Eyring-Powell nanoliquid flow in a vertical microchannel is examined. Impact of considering buoyancy force, magnetic field, and convective boundary on the thermal system is demonstrated. The modeled nondimensional equations are computed by using the Runge-Kutta-Fehlberg method. The vital roles of thermophoresis and Brownian motion are discussed in detail. The significance of second law analysis for thermal systems is presented. The causes of irreversibilities in a microchannel due to Eyring-Powell nanoliquid flow is also demonstrated in the current research study. The upshots of the current investigations are visualized through graphical elucidation. It is established that minimization of entropy generation can be achieved by enhancing the mechanism of thermophoresis. The convective boundary helps in transmitting heat from the thermal system to the ambience hence the lower thermal field is attained.

Section: Introductionmentioning

confidence: 99%

Analysis of second law on Eyring‐Powell nanoliquid flow in a vertical microchannel considering magnetic field and convective boundary

2020

Heat Trans

“…The magnetohydrodynamic (MHD) stream of nanoliquid over L-shaped ribs was investigated by Toghraie et al [31] . The contemporary models [32][33] which described the efficient thermal conductivity ratio were given to analyze the nanofluid flow in a microchannel.…”

Section: Introductionmentioning

confidence: 99%

Flow of colloidal suspension and irreversibility analysis with aggregation kinematics of nanoparticles in a microchannel

Appl. Math. Mech.-Engl. Ed.

2020

Self Cite

The current exploration focuses on the ethylene glycol (EG) based nanoliquid flow in a microchannel. The effectiveness of the internal heat source and linear radiation is reflected in the present investigation. The estimation of suitable thermal conductivity model has affirmative impact on the convective heat transfer phenomenon. The examination is conceded with the nanoparticle aggregation demonstrated by the Maxwell-Bruggeman and Krieger-Dougherty models which tackle the formation of nanolayer. These models effectively describe the thermal conductivity and viscosity correspondingly. The dimensionless mathematical expressions are solved numerically by the Runge Kutta Fehlberg approach. A higher thermal field is attained for the Bruggeman model due to the formation of thermal bridge. A second law analysis is carried out to predict the sources of irreversibility associated with the thermal system. It is remarked that lesser entropy generation is obtained for the aggregation model. The entropy generation rate declines with the slip flow and the thermal heat flux. A notable enhancement in the Bejan number is attained by increasing the Biot number. It is established that the nanoparticle aggragation model exhibits a higher Bejan number in comparision with the usual flow model.

“…Natural convection flow of nanofluid has been discussed by Dogonchi et al 26 for elliptical heater and in rhombus enclosure 27 subjected to particle shapes. Gireesha and Sindhu 28 explored the impact of diverse shape on convective heat transport driven by nanofluid flow in a microchannel. Sindhu et al 29 employed distinct fluid models to demonstrate the effect of shape factor on multiwalled carbon nanotubes in the presence of heat source.…”

Section: Introductionmentioning

confidence: 99%

Transport of magnetohydrodynamic nanofluid in a microchannel based on mixture theory with particle shape effect

2020

Heat Trans

Intensification of heat transport in a thermal system has attracted researchers nowadays. Among various methods, suspension of nanoparticles of distinct shapes plays a vital role in enhancing the heat transfer phenomenon. The aim of this study is to scrutinize the consequences of induced magnetic field on nanofluid flow in an horizontal microchannel formed by two parallel plates. Imports of heat source and convective boundary condition on flow and thermal field are deliberated. The modeled How to cite this article: Sindhu S, Gireesha BJ. Transport of magnetohydrodynamic nanofluid in a microchannel based on mixture theory with particle shape effect.