@Article{hmt.14.29,
AUTHOR = {Quanfu Gao
, Kun Zhang, Liang Bi Wang},
TITLE = {NUMERICAL ANALYSIS OF NATURAL CONVECTION IN  INTERNALLY FINNED HORIZONTAL ANNULI},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {14},
YEAR = {2020},
NUMBER = {1},
PAGES = {1--10},
URL = {http://www.techscience.com/fhmt/v14n1/52949},
ISSN = {2151-8629},
ABSTRACT = {Detailed numerical analysis is presented for natural convection heat transfer in internally finned horizontal annuli. Governing equations are discretized 
using the finite volume method, and solved using SIMPLE algorithm with Quick scheme. The results show that the flow and heat transfer can reach 
steady state when the Rayleigh number is below 2×10<sup>4</sup>. When the Rayleigh number is greater than 3×10<sup>4</sup>
, two different types of numerical solutions 
under the same parameters can be obtained for different initial conditions. The critical Rayleigh numbers with two different initial conditions are 
different from steady to unsteady solutions. The oscillatory flow undergoes several bifurcations and ultimately evolves to a chaotic flow as the Rayleigh 
numbers increase.},
DOI = {10.5098/hmt.14.29}
}