Finite difference-based lattice Boltzmann simulation of natural convection heat transfer in a horizontal concentric annulus

✍ Scribed by Yong Shi; T.S. Zhao; Z.L. Guo

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 318 KB
• Volume: 35
• Category: Article
• ISSN: 0045-7930
• DOI: 10.1016/j.compfluid.2004.11.003

✦ Synopsis

In this paper, a finite difference-based lattice BGK model for thermal flows is proposed based on the double-distribution function approach. We applied this model to simulate natural convection heat transfer in a horizontal concentric annulus bounded by two stationary cylinders with different temperatures. Velocity and temperature distributions as well as Nusselt numbers were obtained for the Rayleigh numbers ranging from 2.38 • 10 3 to 1.02 • 10 5 with the Prandtl number around 0.718. It is found that the numerical results are in good agreement with the experimental and numerical results reported in the literature.