Thermal analysis of nanofluid saturated in inclined porous cavity cooled by rotating active cylinder subjected to convective condition

Convective heat transfer in a porous cavity conjugated with an active rotating cylinder is investigated in this paper. Copper–water nanofluid fills the porous cavity. The rotating active cylinder is positioned in such a way conveying heat from the cavity and discharges it outside. The vertical walls...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2021-05, Vol.144 (4), p.1299-1323
Main Authors: Jabbar, Mohammed Y., Hamzah, Hameed K., Ali, Farooq H., Ahmed, Saba Y., Ismael, Muneer A.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Boundary conditions
Chemistry
Chemistry and Materials Science
Computational fluid dynamics
Convective heat transfer
Darcy number
Finite element method
Fluid flow
High temperature
Inclination angle
Inorganic Chemistry
Measurement Science and Instrumentation
Nanofluids
Nusselt number
Physical Chemistry
Polymer Sciences
Porous media
Richardson number
Rotating cylinders
Thermal analysis
Thermal conductivity
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Summary:Convective heat transfer in a porous cavity conjugated with an active rotating cylinder is investigated in this paper. Copper–water nanofluid fills the porous cavity. The rotating active cylinder is positioned in such a way conveying heat from the cavity and discharges it outside. The vertical walls of the cavity are thermally insulated while the bottom wall is moving to the right and kept at a constant high temperature. The governing equations are facilitated with the ability to study the tilt of the cylinder-cavity assembly. The effects of Richardson number, Darcy number, inclination angle, conductivity ratio, rotational speed, and nanofluid volume fraction are studied at a constant Rayleigh number of 10 5 . Galerkin finite element method of weak formulation is used to solve the dimensionless governing equation with appropriate boundary conditions. Darcy–Brinkman–Forchheimer model is adopted to govern the flow inside porous medium. Results show that the rotation of the cylinder can enlarge the average Nusselt number more than 223%, while ten times increase of thermal conductivity ratio amplifies Nusselt number by 136%. It is also found that the Richardson number plays an adverse role on the average Nusselt number. Physical explanations and thorough validations are given in the paper.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-020-09668-x