摘要
为了尽可能缩短铸件凝固模拟的计算时间,从不同的角度对凝固模拟求解中的时间步长的计算进行了分析;并根据能量守恒原理,在考虑热传导、对流、辐射情况下进行了时间步长的推算,得出了差分网格单元在不同条件、不同位置的实用时间步长计算公式。通过实例验证,采用准确的时间步长,既能避免计算发散又能提高计算效率。
In order to cut calculation time of solidification simulation to as short as possible, the calculation of time step in solidification simulation is analyzed from different aspect. Time step is calculated by considering the heat conduction, convection and radiation based on the conservation of energy. Practical calculation formula of time step for different grid unit under different condition and place is obtained. The experiments show that： They are onot onty avoid operating radiation but improve fate by correct time step.
出处
《铸造技术》
EI
CAS
北大核心
2006年第4期398-400,共3页
Foundry Technology
基金
国家自然科学基金资助项目(10176009)
国家航天支撑技术基金资助项目(2002年)
关键词
凝固模拟
时间步长
计算方法
Solidification simulation
Time step
Algorithm
