@Article{CiCP-17-4,
author = {},
title = {Effects of Reynolds and Prandtl Numbers on Heat Transfer Around a Circular Cylinder by the Simplified Thermal Lattice Boltzmann Model},
journal = {Communications in Computational Physics},
year = {2015},
volume = {17},
number = {4},
pages = {937--959},
abstract = {<p style="text-align: justify;">In this paper, the fluid flow and heat transfer around a circular cylinder are
studied under various conditions (Reynolds number 10 ≤ Re ≤ 200; Prandtl number,
0.1 ≤ Pr ≤ 2). To solve the governing equations, we use the simplified thermal lattice
Boltzmann model based on double-distribution function approach, and present a corresponding
boundary treatment for both velocity and temperature fields. Extensive
numerical results have been obtained to the flow and heat transfer behaviors. The
vortices and temperature evolution processes indicate that the flow and temperature
fields change synchronously, and the vortex shedding plays a determinant role in the
heat transfer. Furthermore, the effects of Reynolds and Prandtl number on the flow
and isothermal patterns and local and averaged Nusselt numbers are discussed in detail.
Our simulations show that the local and averaged Nusselt numbers increase with
the Reynolds and Prandtl numbers, irrespective of the flow regime. However, the minimum
value of the local Nusselt number can shift from the rear point at the back of the
cylinder with higher Prandtl number even in the steady flow regime, and the distribution
of the local Nusselt number is almost monotonous from front stagnation point to
rear stagnation point with lower Prandtl number in the unsteady flow regime.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.2014.m314},
url = {https://global-sci.com/article/80406/effects-of-reynolds-and-prandtl-numbers-on-heat-transfer-around-a-circular-cylinder-by-the-simplified-thermal-lattice-boltzmann-model}
}