Study on Temperature Oscillation Phenomenon in FEM Numerical Simulation

被引：0
|
作者：
Shen, Bo [1 ]
Fan, Tao [1 ]
Pan, Zaiyong [1 ]
Jin, Quanlin [2 ]
Wang, Xinyun [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
[2] China Acad Machinery Sci & Technol, Adv Mfg Technol Ctr, Beijing 100083, Peoples R China
来源：
11TH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN INDUSTRIAL FORMING PROCESSES (NUMIFORM 2013) | 2013年 / 1532卷
关键词：
Numerical Oscillation; Temperature Derivative; Lumped Heat Capacity Matrix; FEM;
D O I：
10.1063/1.4806960
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The reasons of temperature field oscillation in numerical simulation are studied in this paper by theoretical analysis and simple calculation examples. The temperature derivative of an actual temperature field is continuous, but after FEM discretization, temperature derivative is not continuous on the both side of inner boundaries. It means heat flux vectors flowing in and out an inner boundary are not equal, which lead to temperature oscillation of numerical simulation result. After programing verification, it shows that replacing coordinate heat capacity matrix by lumped heat capacity matrix can reduce temperature oscillation effectively.
引用
收藏
页码：1112 / 1117
页数：6
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