Numerical Study on the Effect of Inclination Angles on Natural Convection in Entrance Region using Regularised Lattice Boltzmann BGK Method

M. Basha; C. S. Nor Azwadi

Numerical Study on the Effect of Inclination Angles on Natural Convection in Entrance Region using Regularised Lattice Boltzmann BGK Method

Authors

M. Basha Department of Thermo-fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor, Malaysia.
C. S. Nor Azwadi Department of Thermo-fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor, Malaysia.

Keywords:

Lattice Boltzmann Method, Multi-Population Distribution , Natural Convection , Entrance Region , Channel

Abstract

A numerical study of incompressible laminar natural convection in entrance region of two dimensional vertical and inclined channels using Regularized Lattice Boltzmann Bhatnaghar- Gross-Krook (RLBGK) method is presented in this paper. Individual distribution functions with lattice types D2Q9 and D2Q5 are considered to solve fluid flow and thermal fields, respectively. Rayleigh number is varied from 102 to 106. The channel inclination angle is varied from 0 to 60°. Aspect ratio of channel is equal to 5. A set of distribution functions is proposed to mimic Bernoulli’s equation for calculating pressure at the inlet. Predicted velocity and temperature fields are compared with velocity
and temperature fields found from finite volume code Fluent. Also, predicted Nusselt numbers are compared with Nusselt numbers correlation. Results are in good agreement with results found from FLUENT code.

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Published

2015-06-15

How to Cite

M. Basha, & C. S. Nor Azwadi. (2015). Numerical Study on the Effect of Inclination Angles on Natural Convection in Entrance Region using Regularised Lattice Boltzmann BGK Method. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 10(1), 11–26. Retrieved from https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2551