A study on the influence of closure model and numerical technology on the stability of two-fluid model

被引：2
作者：
Zhang, Hao [1 ]
Zhao, Meng [1 ]
Yang, Yanhua [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai, Peoples R China
来源：
ANNALS OF NUCLEAR ENERGY | 2024年 / 205卷
关键词：
Two-fluid model; Stability; Interfacial drag; Cell size; Time step control; Time-smoothing; 2-PHASE FLOW;
D O I：
10.1016/j.anucene.2024.110606
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 influence of closure model and numerical technology on two-fluid model's stability is studied. A stability analysis method for two-fluid model with interfacial drag term is proposed. The stability depends on the eigenvalue spectral radius of a perturbation growth rate matrix. By analyzing eigenvalue spectral radius, the effect of interfacial drag, cell size, time step and time-smoothing is studied. The main findings are: Besides interfacial drag coefficient's magnitude, the mathematic form of drag coefficient model also has large effect. Increase of cell size, decrease of time step and time-smoothing do not necessarily lead to stability enhancement. The effectiveness of stability enhancement technology depends on relationship between spectral radius and cell size, time step and time-smoothing coefficient.
引用
收藏
页数：18
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