Entropy generation analysis of a nanofluid flow in MHD porous microchannel with hydrodynamic slip and thermal radiation

Ibáñez, Guillermo; López, Aracely; Pantoja, Joel; Moreira, J.

doi:10.1016/j.ijheatmasstransfer.2016.04.089

Cited by 113 publications

(37 citation statements)

References 38 publications

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“…The validity of this assumption has been shown in a number of recent investigations of the systems with similar configurations to that of Figure 1 [19,[35][36][37][38][39], and hence is not further discussed here. In particular, this assumption is very realisable in the limit of low thermal Peclet number, which is frequently reached in microreactors [3].…”

Section: Governing Equationsmentioning

confidence: 93%

Non-Equilibrium Thermodynamic Analysis of Double Diffusive, Nanofluid Forced Convection in Catalytic Microreactors with Radiation Effects

Govone

Torabi

Hunt

et al. 2017

Entropy

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This paper presents a theoretical investigation of the second law performance of double diffusive forced convection in microreactors with the inclusion of nanofluid and radiation effects. The investigated microreactors consist of a single microchannel, fully filled by a porous medium. The transport of heat and mass are analysed by including the thick walls and a first order, catalytic chemical reaction on the internal surfaces of the microchannel. Two sets of thermal boundary conditions are considered on the external surfaces of the microchannel; (1) constant temperature and (2) constant heat flux boundary condition on the lower wall and convective boundary condition on the upper wall. The local thermal non-equilibrium approach is taken to thermally analyse the porous section of the system. The mass dispersion equation is coupled with the transport of heat in the nanofluid flow through consideration of Soret effect. The problem is analytically solved and illustrations of the temperature fields, Nusselt number, total entropy generation rate and performance evaluation criterion (PEC) are provided. It is shown that the radiation effect tends to modify the thermal behaviour within the porous section of the system. The radiation parameter also reduces the overall temperature of the system. It is further demonstrated that, expectedly, the nanoparticles reduce the temperature of the system and increase the Nusselt number. The total entropy generation rate and consequently PEC shows a strong relation with radiation parameter and volumetric concentration of nanoparticles.

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Section: Governing Equationsmentioning

confidence: 93%

Non-Equilibrium Thermodynamic Analysis of Double Diffusive, Nanofluid Forced Convection in Catalytic Microreactors with Radiation Effects

Govone

Torabi

Hunt

et al. 2017

Entropy

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“…Investigations of MHD flows are mostly in vertical moving porous plate (Mohamed and Abo-Dahab, 2009), vertical porous plate (Islam et al 2015;Khan et al 2014;Murthy et al 2015;Ramachandra et al 2011), vertical insulated porous plate (Baoku et al 2013), infinite inclined porous plate (Das et al 2015), semi-infinite vertical porous plate (Ravikumar et al 2014) etc. In recent days, nanotechnology has received a lot of attention (Bég et al 2014;Dogonchi and Ganji, 2016;Ferdows et al 2013;Ibáñez et al 2016;Kandasamy et al 2016;Mosayebidorcheh et al 2016;Pandey et al 2016;Shahmohamadi and Rashidi, 2016;Sheikholeslami et al, 2016;Biswas et al, 2017;Arifuzzaman et al 2017;Biswas et al, 2018) where the further development of higher performance is still going due to effective applications in the field of cooling (transformer cooling, electronics device cooling, silicon mirror cooling, vehicles cooling, controlling fusion), biomedical (magnetic cell separation, drug delivery, cancer therapeutics, cryopreservation, nanocryosurgery) etc. The term "nanofluid" can be refers to a class of fluids by suspending nanometre sized (1-100 nm diameters) particles in common base fluids of highly enhanced thermal properties.…”

Section: Introductionmentioning

confidence: 99%

MHD Maxwell Fluid Flow in Presence of Nano-Particle Through a Vertical Porous-Plate With Heat-Generation, Radiation Absorption and Chemical Reaction

Arifuzzaman

Khan²,

Islam

et al. 2017

Frontiers in Heat and Mass Transfer

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Present study concerns with the numerical investigation of MHD transient naturally convective and higher order chemically reactive Maxwell fluid with Nano-particle flow through a vertical porous plate with the effects of heat generation and radiation absorption. A boundary layer approximation is carried out to develop a flow model representing time dependent momentum, energy, and concentration equations. The governing model equations in partial differential equations (PDEs) form are transformed into a set of nonlinear ordinary differential equation (ODEs) by using non-similar technique. Explicit Finite Difference Method (EFDM) is employed by implementing an algorithm in Compaq Visual Fortran 6.6a to solve the obtained set of nonlinear coupled ODEs. For optimizing the system parameter and accuracy of the system, the stability and convergence analysis (SCA) are carried out. It is observed that with initial boundary conditions, U =V =T = C= 0 and for Δτ = 0.005, ΔX = 0.20 and ΔY = 0.25, the system converged at Prandtl number, Pr ≥ 0.209 and Lewis number, Le ≥ 0.16. The velocity, temperature and concentration flow are investigated and shown graphically with the effect of system parameters. Furthermore, the effect of system parameters on skin friction coefficient, Cf, Nusselt number, Nu, and Sherwood number, Sh, are also examined and tabularized.

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“…Based on this, Bejan [15,16] used the second law of thermodynamics to describe the minimization of entropy generation in an irreversible process by accounting for the component and sub-component that depletes the available energy for work. Also, Ibáñez et al [17] reported the global entropy in a radiative nanofluid flow through a micro-channel with slippage. Hussain et al [18] investigated MHD mixed convection and entropy generation under an inclined magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis for Buoyancy-Induced Couple Stress Nanofluid Flow with Constant Heat Flux

Adesanya

Ogunseye

Falade

et al. 2017

Entropy

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This paper addresses entropy generation in the flow of an electrically-conducting couple stress nanofluid through a vertical porous channel subjected to constant heat flux. By using the Buongiorno model, equations for momentum, energy, and nanofluid concentration are modelled, solved using homotopy analysis and furthermore, solved numerically. The variations of significant fluid parameters with respect to fluid velocity, temperature, nanofluid concentration, entropy generation, and irreversibility ratio are investigated, presented graphically, and discussed based on physical laws.

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Entropy generation analysis of a nanofluid flow in MHD porous microchannel with hydrodynamic slip and thermal radiation

Cited by 113 publications

References 38 publications

Non-Equilibrium Thermodynamic Analysis of Double Diffusive, Nanofluid Forced Convection in Catalytic Microreactors with Radiation Effects

Non-Equilibrium Thermodynamic Analysis of Double Diffusive, Nanofluid Forced Convection in Catalytic Microreactors with Radiation Effects

MHD Maxwell Fluid Flow in Presence of Nano-Particle Through a Vertical Porous-Plate With Heat-Generation, Radiation Absorption and Chemical Reaction

Thermodynamic Analysis for Buoyancy-Induced Couple Stress Nanofluid Flow with Constant Heat Flux

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