Heat transfer characteristics of a boundary-layer flow driven by a power-law shear over a semi-infinite flat plate

In this paper we investigate numerically the hydromagnetic boundary layer flow and heat transfer characteristics of a nanofluid using three types of nanoparticles (copper, aluminium oxide and titanium dioxide) having various shapes (spherical, cylindrical, arbitrary, etc) by considering three kinds of base fluids (water, ethylene glycol and engine oil) over a nonlinear inclined stretching surface, taking into account the effect of convective surface condition. Using similarity transformations, the governing nonlinear partial differential equations of the physical model are transformed into non-dimensional ordinary differential equations which are solved for local similar solutions using the very robust computer algebra software, Maple 13. The numerical simulation is carried out to investigate the role of the pertinent parameters on the flow and temperature fields as well as on the rate of heat transfer and on the rate of shear stress. The results show that the addition of nanoparticles to the base fluid may not always increase the rate of heat transfer. It depends significantly on the surface convection, type of base fluid and nanoparticles. The finding of this study will open a gate for better understanding of nanofluid characteristics.

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Boundary Layer Flow and Heat Transfer of FMWCNT/Water Nanofluids over a Flat Plate

Fluids ◽

10.3390/fluids1040031 ◽

2016 ◽

Vol 1 (4) ◽

pp. 31 ◽

Cited By ~ 36

Author(s):

Mohammad Safaei ◽

Goodarz Ahmadi ◽

Mohammad Goodarzi ◽

Amin Kamyar ◽

S. Kazi

Keyword(s):

Heat Transfer ◽

Boundary Layer ◽

Flat Plate ◽

Boundary Layer Flow ◽

Flow And Heat Transfer ◽

Layer Flow

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Heat Transfer in a Magnetohydrodynamic Boundary Layer Flow of a Non-Newtonian Casson Fluid Over an Exponentially Stretching Magnetized Surface

Journal of Nanofluids ◽

10.1166/jon.2021.1777 ◽

2021 ◽

Vol 10 (2) ◽

pp. 172-185

Author(s):

Golbert Aloliga ◽

Yakubu Ibrahim Seini ◽

Rabiu Musah

Keyword(s):

Heat Transfer ◽

Boundary Layer ◽

Boundary Layer Flow ◽

Thermal Boundary Layer ◽

Stretching Sheet ◽

Casson Fluid ◽

Heat Transfer Characteristics ◽

Layer Flow ◽

Exponentially Stretching ◽

Concentration Equation

In this current paper, an investigation has been conducted on the magnetohydrodynamic boundary layer flow of non-Newtonian Casson fluids on magnetized sheet with an exponentially stretching sheet. The similarity approach has been used to transform the governing models for Casson fluid to ordinary differential equations. We presented numerical results for momentum, energy and concentration equation parameters. Effects of the magnetized sheet and varying all the emerged parameters on the flow of Casson fluid with respect to the friction between the fluid and the surface, temperature and concentration are presented in tables. As a result of the induced magnetization of the sheet, the thickness of the thermal boundary layer has been enhanced. This behaviour brings a considerable reduction to the heat transfer. The induced magnetized sheet has a similar influence on the skin friction, Nusselt number and the Sherwood number. We however proposed incorporation of magnetized surfaces in MHD flows for controlling the flow rate of the fluid and heat transfer characteristics.

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