Activation energy for the Carreau-Yasuda nanomaterial flow: Analysis of the entropy generation over a porous medium

Khan, M. Ijaz; Afzal, Sidra; Hayat, Tasawar; Waqas, M.; Alsaedi, Ahmed

doi:10.1016/j.molliq.2019.111905

Cited by 32 publications

(15 citation statements)

References 49 publications

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“…They observed a great reduction in entropy due to an increase in Hartmann number. Khan et al 22 explored the Carreau–Yasuda fluid over a stretching sheet in porous medium considering the effects of chemical reaction and viscous dissipation. The second law of thermodynamics is implemented to obtain the total entropy.…”

Section: Introductionmentioning

confidence: 99%

Entropy analysis of nanofluid magnetohydrodynamic convection flow past an inclined surface: A numerical review

Vedavathi

Dharmaiah²,

Gaffar³

et al. 2021

Heat Trans

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A numerical investigation is conducted to review the entropy study of magnetohydrodynamic (MHD) convection nanofluid flow from an inclined surface. In evaluating the thermophoresis and Brownian motion impacts, Buongiorno's model is applied to nanofluid transfer. Using Keller's implicit box technique, the governing partial differential conservation equations and wall and free stream boundary conditions are made into the dimensionless form and solved computationally. For different thermos physical parameter values, the numerical results are discussed both graphically and numerically. Verification of the present code with previous Newtonian responses is also included. To analyze the variability in fluid velocity, temperature, nanoparticle volume fraction, entropy, Bejan number, shear stress rate, wall heat, and mass transfer rates, graphical and tabulated results are reported. The study suggests applications in the manufacturing of nanomaterial fabrication, and so on.

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Section: Introductionmentioning

confidence: 99%

Entropy analysis of nanofluid magnetohydrodynamic convection flow past an inclined surface: A numerical review

Vedavathi

Dharmaiah²,

Gaffar³

et al. 2021

Heat Trans

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“…Waqas et al [19] researched the nonlinear radiation flow of Eyring-Powell nano liquid with magnet dipoles and Arrhenius activation energy. The consequence of activation energy for the Carreau-Yasuda nanofluid flow was examined by Khan et al [20].…”

Section: Introduction 1review Of the Literaturementioning

confidence: 99%

Numerical Simulation for Bioconvection of Unsteady Stagnation Point Flow of Oldroyd-B Nanofluid with Activation Energy and Temperature-Based Thermal Conductivity Past a Stretching Disk

Rashad¹,

Liu²,

Khan³

2022

Computer Modeling in Engineering &Amp; Sciences

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A mathematical modeling is explored to scrutinize the unsteady stagnation point flow of Oldroyd-B nanofluid under the thermal conductivity and solutal diffusivity with bioconvection mechanism. Impacts of Joule heating and Arrhenius activation energy including convective boundary conditions are studied, and the specified surface temperature and constant temperature of wall (CTW) are discussed. The consequences of thermal conductivity and diffusivity are also taken into account. The flow is generated through stretchable disk geometry, and the behavior of non-linear thermal radiation is incorporated in energy equation. The partial differential equations governing the fluid flow in the structure is reduced into dimensionless nonlinear ODEs by applying suitable similarity variables. The obtained system of non-dimensional nonlinear ODEs is treated numerically with the help of bvp4c solver in Matlab under shooting algorithm. The impact of various prominent parameters on velocity profile, thermal profile, volumetric nanoparticle concentration and microorganism distribution is depicted in graphical form. The numerical outcomes for skin friction coefficient, heat transfer rate, Sherwood number as well as microorganism density number versus various parameters are listed in the tables. The results show that fluid velocity is reduced by increasing buoyancy ratio parameter, while the fluid flow increases with mixed convective parameter. The temperature profile is enhanced with the amount of nonlinear thermal radiation and temperature dependent thermal conductivity. Furthermore, concentration profiles of nanoparticles have opposite behavior for Brownian motion coefficient and thermophoresis diffusion parameter, and it is noticed that by varying Peclet number the microorganisms profile is declined. The proposed study is useful to control and optimize heat transfer in industrial applications.

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“…Arrhenius AE can be useful in fields associated with cooling of nuclear reactors, geothermal or oil repository engineering, chemical engineering, food processing, and oil-water emulsions. [29][30][31] Khan et al 32 considered the flow of Carreau-Yasuda nanofluid in a porous stretching sheet accounting for AE. Khan et al 33 scrutinized the influence of AE in the MHD flow of Carreau-Yasuda fluid over a nonlinearly stretching surface.…”

Section: Introductionmentioning

confidence: 99%

Overlapping grid spectral collocation approach for electrical MHD bioconvection Darcy–Forchheimer flow of a Carreau–Yasuda nanoliquid over a periodically accelerating surface

Mkhatshwa

2021

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Activation energy for the Carreau-Yasuda nanomaterial flow: Analysis of the entropy generation over a porous medium

Cited by 32 publications

References 49 publications

Entropy analysis of nanofluid magnetohydrodynamic convection flow past an inclined surface: A numerical review

Entropy analysis of nanofluid magnetohydrodynamic convection flow past an inclined surface: A numerical review

Numerical Simulation for Bioconvection of Unsteady Stagnation Point Flow of Oldroyd-B Nanofluid with Activation Energy and Temperature-Based Thermal Conductivity Past a Stretching Disk

Overlapping grid spectral collocation approach for electrical MHD bioconvection Darcy–Forchheimer flow of a Carreau–Yasuda nanoliquid over a periodically accelerating surface

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