LATTICE BOLTZMANN METHOD SIMULATION ON FLOW PATTERNS OF NATURAL CONVECTION IN HORIZONTAL CYLINDRICAL ANNULUS

被引：0
|
作者：
Yang, Mo [1 ]
Zhou, Yuwei [1 ]
Zhang, Yuwen [2 ]
Bian, Enjie [1 ]
Li, Zheng [1 ]
机构：
[1] Univ Shanghai Sci & Technol, Coll Energy & Power Engn, Shanghai, Peoples R China
[2] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
来源：
PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2013, VOL 8A | 2014年
关键词：
PRANDTL NUMBER; OSCILLATORY FLOW; HEAT-TRANSFER; TRANSITION; STABILITY; EQUATION; MODEL;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The Lattice Boltzmann method is used to simulate the flow patterns of natural convection in horizontal cylindrical annulus for aspect ratios in the range of 0.4 <= A <= 10 and for Prandtl numbers varying from 0.1 to 0.7. At Pr=0.3 and A=2, flow patterns on the whole range of Rayleigh number are mapped indicating the lower and upper critical values for transitions. At Pr=0.7, the influence of aspect ratio on flow pattern is analyzed acquiring the result that the oscillation flow never happens at A <= 3. At A=2, several Prandtl numbers are calculated at certain Rayleigh number and the conclusion is that the steady upward flow keeps when 0.5 <= Pr. The results are found in good agreement with existed studies.
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页数：10
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