Numerical simulation of thermal radiative heat transfer effects on Fe3O4-ethylene glycol nano uid EHD ow in a porous enclosure

Document Type : Article

Authors

1 Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran.

2 School of Engineering, Ocean University of China, Qingdao 266110, China.;School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522,Australia.

Abstract

Electrohydrodynamic Fe3O4-Ethylene glycol nanofluid forced convection was simulated in presence of thermal radiation. The porous lid driven cavity had one moving positive electrode. A single-phase model was applied to simulate nanofluid behavior.
Control volume based finite element method was employed to obtain the results, which showed the roles of Darcy number (Da), radiation parameter (Rd), Reynolds number (Re),nanofluid volume fraction (ɸ), and supplied voltage (Δφ). Results depicted that maximum values of the temperature gradient were obtained for platelet-shape nanoparticles. Nusselt number was enhanced with increase in Darcy number and supplied voltage. Convection mode rose with increase in permeability of porous media and nanofluid volume fraction, but it decreased with the rise in Hartmann number.

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References

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Scientia Iranica
Volume 26, Issue 3
Transactions on Mechanical Engineering (B)
May and June 2019
Pages 1405-1414

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