Two- and three-dimensional numerical simulations of natural convection in a cylindrical envelope with an internal concentric cylinder with slots

被引：8
|
作者：
Zhang, Kun [1 ,2 ]
Yang, Mo [2 ]
Zhang, Yuwen [3 ]
机构：
[1] Lanzhou Jiaotong Univ, Coll Mech Engn, Key Lab Railway Vehicle Thermal Engn, Lanzhou 730010, Peoples R China
[2] Univ Shanghai Sci & Technol, Coll Power Engn, Shanghai 200093, Peoples R China
[3] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2014年 / 70卷
关键词：
Two dimensional simulation; Three-dimensional simulation; Non-linear characteristic; HORIZONTAL ANNULUS;
D O I：
10.1016/j.ijheatmasstransfer.2013.11.015
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Two-dimensional and three-dimensional numerical simulations were carried out to simulate the natural convection in a cylindrical envelope with an internal concentric cylinder with slots. For the case of steady flow, the numerical solutions in 2D and 3D simulations are in good agreement with the experimental results. When the convection in experiment becomes unsteady convection at the larger slot degree, the oscillated solutions in 3D simulation differ essentially from steady solutions in 2D simulation. The critical Rayleigh numbers from steady to unsteady flow in the 3D simulations are lower than those in the 2D simulations. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：434 / 438
页数：5
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