NATURAL CONVECTION IN HORIZONTAL ECCENTRIC ANNULI: NUMERICAL STUDY
NATURAL CONVECTION IN HORIZONTAL ECCENTRIC ANNULI: NUMERICAL STUDY
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DOI：
10.1080/10407789508913690
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发表时间：
1995
影响因子：
2
通讯作者：
G. Guj;F. Stella
中科院分区：
文献类型：
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作者：
G. Guj;F. Stella
在层流稳态条件下，数值研究了水平偏心圆柱（Ro/ Rin = 2.36）之间的二维环形空间内的流体动力场和温度场。对Pr = 0.71，0.53 × 104 ≤ RaL ≤ 8.27 × 104和较宽的偏心率范围（0 ≤ e < 1）的典型流体，采用Boussinesq近似求解了Navier-Stokes方程。控制方程采用原始变量形式，避免了压力单值性的附加积分条件。内缸的水平偏心率给出，与已知的数值结果相比，在两个气缸之间的通道中的非零方位角流速，并大大改变了热场和羽流的几何形状。同心和水平偏心配置与现有的数值和实验结果的比较和讨论。
The fluid dynamic and thermal fields in a two-dimensional annulus between horizontally eccentric cylinders ( Ro/ Rin = 2.36) are numerically studied in laminar steady conditions. The Navier-Stokes equations with Boussinesq approximation are solved for a typical fluid with Pr = 0.71, 0.53 X 104 ≤ RaL ≤ 8.27 X 104, and a wide eccentricity range ( 0 ≤ e < 1 ). The governing equations are written in primitive variable form to avoid the enforcement of the additional integral condition for the pressure single valuedness. The horizontal eccentricity of the inner cylinder gives, in contrast with known numerical results, a nonzero azimuthal flow rate in the channel between the two cylinders and substantially alters the thermal field and the geometry of the plume. Comparisons with available numerical and experimental results for concentric and horizontally eccentric configurations are presented and discussed.