Study on Temperature Oscillation Phenomenon in FEM Numerical Simulation
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.
Numerical Oscillation Temperature Derivative Lumped Heat Capacity Matrix FEM
Bo Shen Tao Fan Zaiyong Pan Quanlin jin Xinyun Wang
State Key Lab of Materials Processing and Die & Mould Technology,Huazhong University of Science and Advanced Manufacture Technology Center,China Academy of Machinery Science & Technology,Beijing 10008
国际会议
沈阳
英文
1112-1117
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）