Inherent irreversibility in a reactive and radiating magnetic nanoliquid film along a slippery inclined heated surface with convective cooling

Eegunjobi, Adetayo Samuel; Makinde, Oluwole Daniel

doi:10.1002/htj.21675

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…Li et al (2020) interpreted the effect of an inclined partition on natural convection with constant thermal conductivity and entropy generation of a nanofluid under magnetic field inside an inclined enclosure, which can be applied for electronic cooling. Eegunjobi and Makinde (2020) analyzed innate irreversibility along a slippery inclined heated surface in a reactive and radiating magnetic nanoliquid film with convective cooling in which they reported that thermophoresis and chemical reaction parameter boost the temperature.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic irreversibility of Al₂O₃–H₂O nanofluid Poiseuille flow with variable viscosity and convective cooling

Almeida

Gireesha

Venkatesh

et al. 2020

HFF

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Purpose This study aims to investigate the flow behavior of aluminum oxide–water nanofluid with variable viscosity flowing through the microchannel parallel with the ground, with low aspect ratio. The study focuses on the first and second law analyses of Poiseuille flow using water as the base fluid with alumina nanoparticles suspended in it. Combined effects of thermal radiation, viscous dissipation, variable viscosity, nanoparticle shape factor and volume fraction on the thermal performance are studied and the in-built irreversibility in the process is examined. Design/methodology/approach The governing equations with dimensions are reduced to non-dimensional equations by using dimensionless quantities. Then, the Runge–Kutta–Fehlberg shooting scheme tackles the present non-linear equations. Findings The outcomes of the present analysis reveal that the activation energy parameter with its increase, depletes the exergetic effectiveness of the system, thus defending the fact to keep the activation energy parameter the lowest as possible for the system efficiency. In addition, thermal radiation and Biot number enhance the release of heat energy, thereby cooling the system. Bejan number graph exhibits the decreasing behavior for the increased nanoparticle shape factor, whereas the temperature enhances with the rise in nanoparticle shape factor. Originality/value The effects of nanoparticle shape factor in Poiseuille flow for alumina–water nanoliquid in low aspect ratio microchannel is inspected at the earliest. Exergetic effectiveness of the system is studied and heat transfer characteristics are explored for thermal radiation effect and activation energy parameter. Besides, BeηSphere>BeηBlades.

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Section: Introductionmentioning

confidence: 99%

Intrinsic irreversibility of Al₂O₃–H₂O nanofluid Poiseuille flow with variable viscosity and convective cooling

Almeida

Gireesha

Venkatesh

et al. 2020

HFF

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show abstract

“…where, The local volumetric rate of entropy generation SG for the configuration under study is found as (following the authors in [9,12,13,20,25,33,34])…”

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confidence: 99%

Dual Entropy Regime in Channel Flow Subjected to Temperature Dependent Convection Mechanism

Vyas¹,

Khan²

2021

IJHT

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The central stimuli of this brief note is to underscore the effect of the temperature dependent convection coefficient that give rise to a dual temperature regime facilitating dual entropy distribution. In order to avoid unwarranted complexities, a simple geometry of shear flow in a channel is considered. The energy equation amenable to an analytic solution is simulated to extract the desired numerical findings in as much as for what parameters’ values, the temperature has dual distribution /does not yield temperature distribution at all. In fact, a range of parameter values have been worked out for which dual temperature regime exists or not. The plots of entropy generation number Ns also show the dual regime. The findings reveal a qualitative and quantitative difference in dual systems of temperature and entropy. It further underlines that the thermal systems with the idealized uniform heat transfer coefficient may be far distinct from actual behaviour and even weak temperature dependence of convection coefficient need due attention while designing a system.

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Analysis of entropy generation and MHD thermo‐solutal convection flow of Ellis nanofluid through inclined microchannel

Das,

Makinde,

Kairi

2024

Z Angew Math Mech

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This study investigates heat, mass transport, and entropy production in Ellis nanofluid flow through an inclined permeable microchannel, considering Navier's slip effects with convective boundary conditions. It incorporates nanoparticle's thermophoresis and Brownian motion effects under a transverse magnetic field, with fluid suction and injection at microchannel walls. Under appropriate physical assumptions, the problem is presented as nonlinear ordinary differential equations, which are later nondimensionalized. The MATLAB bvp4c solver is used for numerical solutions of the transformed equations. Graphical depictions in the study illustrate how various factors influence velocity, temperature, concentration, Bejan number, and entropy generation. Engineering parameters, affected by changes in critical factors, are presented in tabular format, including the skin friction coefficient, Nusselt number, and Sherwood number. Notably, the enhancement in Ellis fluid parameter has a dual effect, enhancing velocity and Bejan number in the microchannel's lower half, while reversing in the upper half. For the increment in Ellis parameter, the impact on Bejan number for 0.5 is significant and the effect on entropy production contrasts with that of Bejan number. This research offers practical insights for designing efficient microfluidic heat exchangers and developing advanced nanofluids for improved thermal performance while minimizing entropy generation. Additionally, it underscores the potential for innovation within the domain of microfluidics and nanomaterial‐driven heat transfer systems. Furthermore, it should be noted that the flow behavior of Ellis nanofluids within microchannels can closely replicate natural flow patterns found in biological systems, offering insights that could have numerous applications in biology and related fields.

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Inherent irreversibility in a reactive and radiating magnetic nanoliquid film along a slippery inclined heated surface with convective cooling

Cited by 7 publications

References 19 publications

Intrinsic irreversibility of Al₂O₃–H₂O nanofluid Poiseuille flow with variable viscosity and convective cooling

Intrinsic irreversibility of Al₂O₃–H₂O nanofluid Poiseuille flow with variable viscosity and convective cooling

Dual Entropy Regime in Channel Flow Subjected to Temperature Dependent Convection Mechanism

Analysis of entropy generation and MHD thermo‐solutal convection flow of Ellis nanofluid through inclined microchannel

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Inherent irreversibility in a reactive and radiating magnetic nanoliquid film along a slippery inclined heated surface with convective cooling

Cited by 7 publications

References 19 publications

Intrinsic irreversibility of Al2O3–H2O nanofluid Poiseuille flow with variable viscosity and convective cooling

Intrinsic irreversibility of Al2O3–H2O nanofluid Poiseuille flow with variable viscosity and convective cooling

Dual Entropy Regime in Channel Flow Subjected to Temperature Dependent Convection Mechanism

Analysis of entropy generation and MHD thermo‐solutal convection flow of Ellis nanofluid through inclined microchannel

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Intrinsic irreversibility of Al₂O₃–H₂O nanofluid Poiseuille flow with variable viscosity and convective cooling

Intrinsic irreversibility of Al₂O₃–H₂O nanofluid Poiseuille flow with variable viscosity and convective cooling