Baliti, J. and Hssikou, M. and Alaoui, M. (2016) Numerical simulation of heat transfer in a micro-cavity. Canadian Journal of Physics, 95 (1). pp. 85-94.

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Abstract

The behaviour of rarefied monatomic gas of Maxwell particles within a rectangular enclosure is investigated, with the Navier-Stokes and Fourier field of equations with first-(NSF) and second-order boundary conditions (NSF2) of the velocity slip and temperature jump, and the regularized 13 moments approach (R13). The enclosure considered has a heated bottom with lateral walls that have specular reflection. The effect of the three dimensionless parameters characterizing the simulated problem, the cavity aspect ratio, the Knudsen number, and the temperature ratio of the hot over the cold walls, on the flow and bulk quantities is examined. For the small Knudsen numbers the flow presents one type of streamlines from the cold to hot plate in both NSF and R13 theories, while by increasing the Knudsen number the flow becomes more complex and presents hot to cold flow streamlines in the extended approach of R13. These rarefaction effects cannot be predicted by the classical continuum approach of NSF. The increase of the temperature ratio in R13 affects the hot to cold flow, which begins to vanish, while this type of streamline does not appear by decreasing the aspect ratio. © 2017 Published by NRC Research Press.

Item Type: Article
Uncontrolled Keywords: Aspect ratio; Enclosures; Heat transfer; Maxwell equations, Cavity aspect ratio; Dimensionless parameters; Fourier; Rectangular enclosures; Simulation of heat transfer; Slip and jump; Specular reflections; Temperature ratio, Navier Stokes equations
Subjects: Physics and Astronomy
Divisions: SCIENTIFIC PRODUCTION > Physics and Astronomy
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:49
URI: http://eprints.umi.ac.ma/id/eprint/4464

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