Thermal energy transport on MHD nanofluid flow over a stretching surface: A comparative study

Tripathy

2019

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The study explores the MHD flow of water-based nanofluids past a stretching sheet that melts at a constant rate. Cu and Ag nanoparticles are considered to merge into the base fluid to discuss the flow, heat and mass transfer characteristics. Suitable transformation is employed to transform the governing partial differential equations to a system of nonlinear coupled ordinary differential equations (ODEs). A semi-analytical technique, that is, in particular, the Adomian decomposition method is implemented to tackle this system of ODEs.The influences of characterizing parameters for the flow phenomena are determined via graphs and displayed. Furthermore, the computed values of the quantities of engineering interest are exhibited through tables and discussed. The main findings of the results are laid down as follows: the Cu-water nanofluid momentum is more pronounced than that of Ag-water due to the heavier density of the Ag nanoparticles and an increasing melting parameter is favorable to decrease the fluid temperature, which is useful for the cooling of the substances at the final stage of production in industries. K E Y W O R D S Adomian decomposition method, melting heat transfer, MHD, nanofluids, nanoparticle volume fraction F I G U R E 1 Flow configuration [Color figure can be viewed at wileyonlinelibrary.com]

Section: Introductionmentioning

confidence: 99%

Interaction of Cu and Ag nanoparticles on MHD water‐based nanofluids past a stretching sheet

Nayak

Tripathy

2019

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“…Thumma and Mishra have discussed Consequence of Joule heating and viscous dissipation with and without multi‐slip boundary conditions on MHD Jeffery nanofluid flow. Very recently, Rout and Mishra have significantly deliberated heat and mass transfer effect on MHD nanofluid flow over a stretching surface.…”

Section: Introductionmentioning

confidence: 99%

Semianalytical solution of axisymmetric flows of Cu‐ and Ag‐water nanofluids between two rotating disks

Rout

Nayak

2019

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Present study analyses the axisymmetric flows of copper-and silver-water nanofluids between two rotating disks in the presence of Hartmann number, porous medium, and drag coefficient. Effect of thermal radiation enriches the study as well. In addition to that, the coupling parameter and the Eckert number appear because of the inclusion of viscous dissipation in energy equation. The well-posed transformations are used to transform the governing equation into ordinary and semianalytical procedure, that is, Adomain Decomposition method is used to solved these coupled ODEs. The surface and contour plots for the velocity profiles of both Cu-and Ag-water nanofluids for the effect of physical parameters such as solid volume fraction, drag coefficient, and Reynolds number are obtained and presented in graphs. Also, the behavior of other pertinent parameters characterizes the flow phenomena on the nanofluid velocity and temperature are presented through graphs. The numerical computation of skin friction and Nusselt number are obtained and presented through tables. For the validity, the present results show a good agreement with earlier studies. The major findings of this study are as follows: an increase in solid volume fraction, a resistive force like drag opposes the velocity of the nanofluid, whereas Eckert number enhances the fluid temperature significantly. Heat Transfer-Asian Res. 2019;48:957-981.wileyonlinelibrary.com/journal/htj

“…Mahmood et al discussed the effect of heat transfer of squeezing flow over a porous surface. Many researchers have worked on the flow of nanofluids considering different geometries. Hashmi et al studied the squeezing flow of a magnetohydrodynamic nanofluid between parallel disks.…”

Section: Introductionmentioning

confidence: 99%

Unsteady squeezing flow of water‐based nanofluid between two parallel disks with slip effects: Analytical approach

Bhatta

Dash

2019

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The squeezing flow of an unsteady water-based nanofluid between two parallel disks has been analyzed in the current study. Thermal and solutal buoyancy along with heat source enhance the flow phenomena of free convective flow through a porous medium. In addition to that velocity slip and temperature slip are also accounted for in the boundary conditions. The similarity transformation is adopted to formulate the governing equations that convert the complex partial differential equations (PDEs) to nonlinear ordinary differential equations (ODEs). These transformed equations are handled analytically by using the variation parameter method (VPM). For computational purposes, the fixed numeric values of physical parameters are used and their behaviors are shown by means of graphs. The calculated results for the physical quantities of interest are shown in tables. The conformity of the solution is obtained in comparison to an earlier study in a particular case. The major findings are (i) the velocity profile has distinct variations, which are separated by the middle layer of the channel and (ii) enhancement in the heat transfer coefficient is noted due to the interaction of buoyancy parameter. K E Y W O R D S analytical solution (variation parameter method), free convection, squeezing flow, velocity and temperature slip J E L C L A S S I F I C A T I O N 76D05, 76D10, 76M60, 76S05 Heat Transfer-Asian Res. 2019;48:1575-1594.wileyonlinelibrary.com/journal/htj