A two-dimensional, mixed convection flow in a vented square cavity is investigated numerically using finite volume discretization. The square cavity with inlet and outlet vent is subjected to an external unsteady laminar flow of Cu-water nanofluid. The Reynolds number based on the inlet width and the inlet velocity is fixed to Re = 200. The cavity walls were kept at the ambient temperature T_∞ except for the bottom wall which was maintained at high temperature T_w. A FORTRAN code has been developed and tested to resolve the governing equations. Numerical results of the flow field and the thermal fields are reported and discussed for different Rayleigh numbers varied from 10⁴ to 10⁶, and for different values of the nanoparticles fraction (0.01 to 0.08). It was concluded that the flow field is highly affected by the Rayleigh number, and slightly affected by the nanoparticles fraction. The average Nusselt number increases with Rayleigh numbers and also with the nanoparticles fraction indicating an enhancement of heat transfer rate.

laminar flow, mean Nusselt number, nanoparticles fraction, Rayleigh number.

Received: April 25, 2022; Revised: May 21, 2022; Accepted: June 8, 2022; Published: July 15, 2022

How to cite this article: K. Bouaraour, D. Lalmi and A. Bellaouar, Effect of nanoparticles on the flow inside a vented cavity heated from bottom subjected to an external flow, JP Journal of Heat and Mass Transfer 28 (2022), 45-60. http://dx.doi.org/10.17654/0973576322033

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

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