Effect of Nano-Particles on Natural Convection in Corrugated-Wall Enclosure

The heat transfer and fluid flow in a corrugated square cavity filled with nanofluid are investigated numerically. The opposite vertical walls are taken as having different temperatures, while the horizontal walls are considered as adiabatic. The nanofluid is copper-water, and three different shapes...

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Bibliographic Details
Published in:Journal of engineering thermophysics 2022-09, Vol.31 (3), p.489-505
Main Authors: Heidary, H., Pirmohammadi, M.
Format: Article
Language:English
Subjects:
Algorithms
Boundaries
Fluid dynamics
Fluid flow
Fluid- and Aerodynamics
Free convection
Heat transfer
Nanofluids
Nanoparticles
Particle size
Physics
Physics and Astronomy
Thermodynamics
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Summary:The heat transfer and fluid flow in a corrugated square cavity filled with nanofluid are investigated numerically. The opposite vertical walls are taken as having different temperatures, while the horizontal walls are considered as adiabatic. The nanofluid is copper-water, and three different shapes of corrugated boundaries are investigated here: wavy, triangular, and rectangular. The governing equations are solved with application of the SIMPLE algorithm, based on the control volume approach. This study investigates the effect of several parameters on the heat transfer: the boundary shape, Rayleigh number, nano-particle volume fraction, nano-particle diameter, cycle number, and triangle wave amplitude. The results show that corrugated boundaries reduce the heat transfer. In addition, it is found out that a nanofluid with   of about 0.02 has the highest value of heat transfer enhancement.
ISSN:1810-2328
1990-5432
DOI:10.1134/S1810232822030109