Flow and heat transfer of a nanofluid over a hyperbolically stretching sheet

Ahmad, Adeel; Asghar, S.; Alsaedi, Ahmed

doi:10.1088/1674-1056/23/7/074401

Cited by 14 publications

(4 citation statements)

References 16 publications

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“…The obtained nonlinear partial differential equations are solved analytically by using the optimal homotopy analysis method (OHAM). [35][36][37][38][39][40] After employing OHAM, the obtained nonlinear equations are solved analytically. The results are discussed by considering graphical and tabulated forms.…”

Section: Introductionmentioning

confidence: 99%

Induced magnetic field stagnation point flow of nanofluid past convectively heated stretching sheet with Buoyancy effects

Hayat¹,

Nadeem²

2016

Chinese Phys. B

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This paper presents the buoyancy effects on the magneto-hydrodynamics stagnation point flow of an incompressible, viscous, and electrically conducting nanofluid over a vertically stretching sheet. The impacts of an induced magnetic field and viscous dissipation are taken into account. Both assisting and opposing flows are considered. The overseeing nonlinear partial differential equations with the associated boundary conditions are reduced to an arrangement of coupled nonlinear ordinary differential equations utilizing similarity transformations and are then illuminated analytically by using the optimal homotopy investigation strategy (OHAM). Graphs are introduced and examined for different parameters of the velocity, temperature, and concentration profile. Additionally, numerical estimations of the skin friction, local Nusselt number, and local Sherwood number are explored using numerical values.

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Section: Introductionmentioning

confidence: 99%

Induced magnetic field stagnation point flow of nanofluid past convectively heated stretching sheet with Buoyancy effects

Hayat¹,

Nadeem²

2016

Chinese Phys. B

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“…Indium tin oxide (ITO) is currently the most widely used TCL material on the market. [2] However, due to the high cost of indium (In), the instability in an acid-based environment, and the high temperature of ITO preparation, [3,4] it is urgent to look for an alternative TCL material with high performance and a reasonable price. Two-dimensional (2D) graphene (Gr) possesses excellent photoelectric properties, [5] extraordinary thermal conductivity, and splendid conductivity, [6,7] and there-fore it has aroused widespread attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Effect of graphene/ZnO hybrid transparent electrode on characteristics of GaN light-emitting diodes

Tan

Zhang²,

Qian

et al. 2018

Chinese Phys. B

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In order to reduce the Schottky barrier height and sheet resistance between graphene (Gr) and the p-GaN layers in GaN-based light-emitting diodes (LEDs), conductive transparent thin films with large work function are required to be inserted between Gr and p-GaN layers. In the present work, three kinds of transparent conductive oxide (TCO) zinc oxide (ZnO) films, Al-, Ga-, and In-doped ZnO (AZO, GZO, and IZO), are introduced as a bridge layer between Gr and p-GaN, respectively. The influence of different combinations of Gr/ZnO hybrid transparent conducting layers (TCLs) on the optical and thermal characteristics of the GaN-LED was investigated by the finite element method through COMSOL software. It is found that both the TCL transmittance and the surface temperature of the LED chip reduce with the increase in Gr and ZnO thickness. In order to get the transmittance of the Gr/ZnO hybrid TCL higher than 80%, the appropriate combination of Gr/ZnO compound electrode should be a single layer of Gr with ZnO no thicker than 400 nm (1L Gr/400-nm ZnO), 2L Gr/300-nm ZnO, 3L Gr/200-nm ZnO, or 4L Gr/100-nm ZnO. The LEDs with hybrid TCLs consisting of 1L Gr/300-nm AZO, 2L Gr/300-nm GZO, and 2L Gr/300-nm IZO have good performance, among which the one with 1L Gr/300-nm GZO has the best thermal property. Typically, the temperature of LEDs with 1L Gr/300-nm GZO hybrid TCLs will drop by about 7 K compared with that of the LEDs with a TCL without ZnO film.

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“…In [15] Hayat et al addresses the mixed convection flow of Casson nanofluid over a stretching surface in presence of thermal radiation, heat source/sink and first order chemical reaction. Ahmad et al [16] explores the boundary-layer flow and heat transfer of a viscous nanofluid bounded by a hyperbolically stretching sheet. Recently, Ahmad [17] studied the flow of a classical non-Newtonian fluid, Reiner-Philippoff fluid, in the presence of nanoparticles over a non-linear stretching sheet.…”

Section: Introductionmentioning

confidence: 99%

Mixed convection flow of a nanofluid past a non-linearly stretching wall

et al. 2018

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This paper deals with the boundary-layer mixed convective flow of a viscous nanofluid past a vertical wall stretching with non-linear velocity. The governing equations are transformed into self similar ordinary differential equations using appropriate transformation. Using group theoretic method it is shown that the similarity solutions are possible only for the non-linear stretching velocity having specific form. Numerical solution of the coupled governing equations is obtained using Keller Box method. Correlation expression of reduced Nusselt and Sherwood numbers are obtained by performing linear regression on the data obtained from numerical results. The authenticity of these results is established by calculating the percentage error between the numerical results and correlation expression which is observed to be less than 5%. Effects of Brownian and thermophoretic diffusions and nanoparticles concentration flux on the Nusselt and Sherwood numbers are discussed.

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Flow and heat transfer of a nanofluid over a hyperbolically stretching sheet

Cited by 14 publications

References 16 publications

Induced magnetic field stagnation point flow of nanofluid past convectively heated stretching sheet with Buoyancy effects

Induced magnetic field stagnation point flow of nanofluid past convectively heated stretching sheet with Buoyancy effects

Effect of graphene/ZnO hybrid transparent electrode on characteristics of GaN light-emitting diodes

Mixed convection flow of a nanofluid past a non-linearly stretching wall

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