UNSTEADY 3-DIMENSIONAL BEHAVIOR OF NATURAL-CONVECTION IN HORIZONTAL ANNULUS .4. APPLICATION OF LES TO TURBULENT NATURAL-CONVECTION

被引：0
作者：
TANIGUCHI, N
USUI, Y
FURUYA, M
MIKI, Y
FUKUDA, K
HASEGAWA, S
机构：
来源：
JOURNAL OF THE ATOMIC ENERGY SOCIETY OF JAPAN | 1992年 / 34卷 / 10期
关键词：
TURBULENT NATURAL CONVECTION; LARGE EDDY SIMULATION; FINITE DIFFERENCE METHOD; EXPERIMENTAL DATA; COMPARATIVE EVALUATIONS; ACCURACY; TEMPERATURE DEPENDENCE; CONCENTRIC HORIZONTAL ANNULUS; RAYLEIGH NUMBER; ENERGY SPECTRA; SMAGORINSKY CONSTANT;
D O I：
10.3327/jaesj.34.996
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The large eddy simulation (LES) method is applied to turbulent natural convection in a horizontal concentric annulus. Numerical results are obtained for Rayleigh numbers based on the gap width from 2.51 x 10(6) to 1.18 x 10(9). These results are compared with other researchers' experimental data and the validity of LES is investigated. It is found at LES is very useful even if at high Ra, at which the DNS is not applicable. However, in the cases where temperature differences between cylinders are large, effect of dependency of physical properties on temperature is not negligible, which causes the poor coincidence betwenn the experiments and the numerical results.
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页码：996 / 1004
页数：9
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