Entropy generation of two-layer magnetohydrodynamic electroosmotic flow through microparallel channels

Xie, Zhiyong; Jian, Yongjun

doi:10.1016/j.energy.2017.08.038

Cited by 74 publications

(33 citation statements)

References 82 publications

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“…Currently, many investigative researchers have computed the convective heat and mass transfer of the nanofluids in the microchannel with the EDL effects, the possible inclusion of slip effects, magnetohydrodynamics (MHD), viscous dissipation and so on. Xie and Jian [ 26 ] performed the entropy generation to study the MHD electroosmotic two-layer flow in the microchannel and proved the strong dependence of entropy generation on both the fluid velocity and temperature fields. Jiang et al [ 27 ] theoretically investigated the overlapping EDL induced-electroviscous effect (EVE) on the microchannel flow by considering both the no-slip condition and slip condition.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulations of Buongiorno’s Model for Nanofluid in a Microchannel with Electro-Osmotic Effects and an Exothermal Chemical Reaction

2021

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The article presents a mathematical model for the magnetized nanofluid flow and heat transfer with an exothermic chemical reaction controlled by Arrhenius kinetics. Buongiorno’s model with passive boundary condition is employed to formulate the governing equation for nanoparticles concentration. The momentum equation with slip boundary conditions is modelled with the inclusion of electroosmotic effects which remain inattentive in the study of microchannel flows with electric double layer (EDL) effects. Conclusions are based on graphical and numerical results for the dimensionless numbers representing the features of heat transfer and fluid flow. Frank-Kamenetskii parameter resulting from the chemical reaction showed significant effects on the optimization of heat transfer, leading to increased heat exchangers’ effectiveness. The Hartmann number and slip parameter significantly affect skin friction, demonstrating the notable effects of electroosmotic flow and the exothermic chemical reaction on heat transfer in microchannels. This analysis contributes to prognosticating the convective heat transfer of nanofluids on a micro-scale for accomplishing successful thermal designs.

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Section: Introductionmentioning

confidence: 99%

Modeling and Simulations of Buongiorno’s Model for Nanofluid in a Microchannel with Electro-Osmotic Effects and an Exothermal Chemical Reaction

2021

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“…In their work, Buongiorno's model has been performed and they have scrutinized that the Nusselt number heightens with mixed convective parameter, slip parameter, and bulk mean nanoparticles volume fraction. Several investigations on irreversibility analysis and heat transfer in a microchannel in different aspects has been done 3‐9 . Recently Gireesha and Roja 10 have examined the irreversibility analysis on magnetohydrodynamic (MHD) flow of Casson fluid in a microchannel with the influence of velocity slip and convective conditions.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamics Eyring‐Powell fluid in a vertical porous microchannel with convective boundary condition subjected to entropy generation

Gireesha

Roja

2020

Heat Trans

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This investigation is concentrated on the second law analysis of a magnetohydrodynamics Eyring‐Powell fluid in a vertical microporous channel with the convective boundary conditions under the impacts of heat generation, viscous dissipation, exponential space, temperature dependence, and Joule heating. The reduced form of the governing equations is obtained with the aid of applying nondimensional variables and is resolved using Runge‐Kutta‐Fehlberg's fourth fifth‐order method. The various relevant parameters that affect the heat transfer and entropy have been discussed in detail through graphs. It is found that the impacts of suction/injection, viscous dissipation, and convective conditions are important and the thermal performance can be improved with these factors. The generation of entropy boosts up with the impacts of radiation, space/temperature‐dependent, and Biot number and slows down with Eyring‐Powel parameters. Furthermore, the heat transfer rate amplifies with the magnetic number and the drag force intensifies with the Brinkman parameters. The comparison of results has been performed and it provides an excellent agreement.

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“…Apart from the factors of heat transfer and viscous friction, other parameters such as Joule heating, electromagnetic diffusion, magnetic field, and nanoparticle distribution could be significant to affect energy generation in a microchannel system. e corresponding analysis was performed by Xie and Jian [44] who considered six factors that include heat transfer, viscous friction, Joule heating, electromagnetic diffusion, magnetic field, and nanoparticle distribution to analyze the fluid irreversibility rate in a microchannel with both magnetic and electrical fields being taken into account simultaneously. Xie and Jian considered a two-layer magnetohydrodynamic electroosmotic microchannel flow and analyzed the entropy of the system.…”

Section: Introductionmentioning

confidence: 99%

Fully Developed Flow of a Nanofluid through a Circular Micropipe in the Presence of Electroosmotic Effects

Niazi

2020

Mathematical Problems in Engineering

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Microscale heat sinks based on channels or pipes are designed to restrict the temperatures of microelectromechanical systems, which have a wide range of applications in the modern engineering and mechanics. In this context, this work aims to study heat convection and entropy generation of a fully developed nanofluid flow in a circular micropipe in the presence of an electrical double layer. Buongiorno’s model is employed to exhibit the nanofluid behavior. The governing equations are reduced to a system of nonlinear ordinary differential equations through appropriate similarity transformations. Particularly, we rectify the pressure term as an unknown constant, which makes our flow model compatible with those well-known fluid flow models in macrosize. Highly accurate solutions are obtained and verified. Analysis for physical properties of electric field, velocity field, temperature, and nanoparticle distributions is discussed followed by an investigation of the entropy evolution in the flow. The results show that flow behavior and total entropy of the system depend on the electroosmosis, thermophoresis, and fluid viscosity. However, the influence of the electrical double layer on the flow and system entropy is negligible when the electroosmotic parameter exceeds a maximum value.

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Entropy generation of two-layer magnetohydrodynamic electroosmotic flow through microparallel channels

Cited by 74 publications

References 82 publications

Modeling and Simulations of Buongiorno’s Model for Nanofluid in a Microchannel with Electro-Osmotic Effects and an Exothermal Chemical Reaction

Modeling and Simulations of Buongiorno’s Model for Nanofluid in a Microchannel with Electro-Osmotic Effects and an Exothermal Chemical Reaction

Magnetohydrodynamics Eyring‐Powell fluid in a vertical porous microchannel with convective boundary condition subjected to entropy generation

Fully Developed Flow of a Nanofluid through a Circular Micropipe in the Presence of Electroosmotic Effects

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