Heat transfer analysis of mixed convection flow in a vertical microchannel with electrokinetic effect

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Michael O. Oni ◽  
Basant K. Jha
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Heat Transfer Analysis ◽  
Convection Flow ◽  
Mixed Convection Flow ◽  
Electrokinetic Effect ◽  
Vertical Microchannel

scholarly journals A scientific report on heat transfer analysis in mixed convection flow of Maxwell fluid over an oscillating vertical plate

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Ilyas Khan ◽  
Nehad Ali Shah ◽  
L. C. C. Dennis
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Vertical Plate ◽  
Maxwell Fluid ◽  
Velocity Shear ◽  
Heat Transfer Analysis ◽  
Convection Flow ◽  
Mixed Convection Flow ◽  
Constant Wall Temperature ◽  
Scientific Report

Abstract This scientific report investigates the heat transfer analysis in mixed convection flow of Maxwell fluid over an oscillating vertical plate with constant wall temperature. The problem is modelled in terms of coupled partial differential equations with initial and boundary conditions. Some suitable non-dimensional variables are introduced in order to transform the governing problem into dimensionless form. The resulting problem is solved via Laplace transform method and exact solutions for velocity, shear stress and temperature are obtained. These solutions are greatly influenced with the variation of embedded parameters which include the Prandtl number and Grashof number for various times. In the absence of free convection, the corresponding solutions representing the mechanical part of velocity reduced to the well known solutions in the literature. The total velocity is presented as a sum of both cosine and sine velocities. The unsteady velocity in each case is arranged in the form of transient and post transient parts. It is found that the post transient parts are independent of time. The solutions corresponding to Newtonian fluids are recovered as a special case and comparison between Newtonian fluid and Maxwell fluid is shown graphically.

scholarly journals MHD mixed convection flow in the WCLL: Heat transfer analysis and cooling system optimization

2019 ◽  
Vol 146 ◽  
pp. 809-813 ◽  
Author(s):  
Alessandro Tassone ◽  
Gianfranco Caruso ◽  
Fabio Giannetti ◽  
Alessandro Del Nevo
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Cooling System ◽  
System Optimization ◽  
Heat Transfer Analysis ◽  
Convection Flow ◽  
Mixed Convection Flow

Effect of Nanofluid on Heat Transfer Enhancement for Mixed Convection Flow Over a Corrugated Surface

2020 ◽  
Vol 45 (4) ◽  
pp. 373-383
Author(s):  
Nepal Chandra Roy ◽  
Sadia Siddiqa
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Nusselt Number ◽  
Mixed Convection ◽  
Local Nusselt Number ◽  
Richardson Number ◽  
Thermal Boundary Layer ◽  
Volume Fraction ◽  
Convection Flow ◽  
Mixed Convection Flow

AbstractA mathematical model for mixed convection flow of a nanofluid along a vertical wavy surface has been studied. Numerical results reveal the effects of the volume fraction of nanoparticles, the axial distribution, the Richardson number, and the amplitude/wavelength ratio on the heat transfer of Al2O3-water nanofluid. By increasing the volume fraction of nanoparticles, the local Nusselt number and the thermal boundary layer increases significantly. In case of \mathrm{Ri}=1.0, the inclusion of 2 % and 5 % nanoparticles in the pure fluid augments the local Nusselt number, measured at the axial position 6.0, by 6.6 % and 16.3 % for a flat plate and by 5.9 % and 14.5 %, and 5.4 % and 13.3 % for the wavy surfaces with an amplitude/wavelength ratio of 0.1 and 0.2, respectively. However, when the Richardson number is increased, the local Nusselt number is found to increase but the thermal boundary layer decreases. For small values of the amplitude/wavelength ratio, the two harmonics pattern of the energy field cannot be detected by the local Nusselt number curve, however the isotherms clearly demonstrate this characteristic. The pressure leads to the first harmonic, and the buoyancy, diffusion, and inertia forces produce the second harmonic.

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