Aerodynamics Research of Thermal Fluid Circulation in a Heated Cavity

Guang Zhao

doi:10.4028/www.scientific.net/AMM.668-669.326

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 668-669Aerodynamics Research of Thermal Fluid Circulation...

Aerodynamics Research of Thermal Fluid Circulation in a Heated Cavity

Abstract:

In this paper, numerical simulation of natural convection in a closure square cavity with heating source on the basement is carried out using thermal lattice Boltzmann method. The purpose of this work is to analysis the physics of mass and heat transfer in such a condition. For different Rayleigh numbers, the relative heating area ratio is changed in the range of 0.1-1.0, correspondingly. It is found that the flow pattern is symmetrical for increases from 10³to 10⁶, and the boundary layers at low temperature become thinner, also the circulation rate is higher. For a special Rayleigh number, is as a monotone increment function of relative heating area ratio, and the value of which almost increases linearly when the area is below 0.8, and then reach to its maximum exponentially.

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Periodical:

Applied Mechanics and Materials (Volumes 668-669)

Pages:

326-330

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.668-669.326

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Online since:

October 2014

Authors:

Guang Zhao

Keywords:

Bottom Heating, Lattice Boltzmann Method, Natural Convection, Numerical Simulation

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