摘要
对第三类边界条件下柱体空腔内温饱和多孔介质冻结过程的数值模拟的结果表明:液相区自然对流的存在将使冻结深度减薄,在相同的形状比ξ和斯蒂芬数(Ste)下;修正瑞利数Ra*越大,减薄程度越明显,且固液界面的形状呈现为波动锥面;液相区的对流胞可能表现为一对或多对涡胞,存在着分岔现象。
The numerical simulation for the freezing of liquid-saturated porous meida in a vertical cylindrical cavity under the 3rd kind of thermal boundary condition is reported in this paper.It shows that,the effect of natural convecton in liquid phase will decreese the thickness of freexing layer,and the freezing front will be in wave shape intead of a stable plane,with one or more pair of eddy cells, which indicates the existance of fracture.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1996年第2期213-218,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金
关键词
自然对流
多孔介质
冻结
数值模拟
对流
natural convection
porour medio
freeging
mathematical simulation