摘要
在信息保存法(IP)方法的基础上,提出了一个简单易行的温度模型,该模型可以有效模拟计算有温度变化的流动.此外研究发现,在用IP方法模拟计算的流场局部密度变化很大时,如果采用质量守恒方程的二阶中心差分格式更新信息密度时会使计算发散,因此建议采用一阶迎风格式更新信息密度.
Based on the information preservation(IP) method, a simple effective temperature model is presented. The IP method with new temperature model can simulate the flow which has temperature variation. Moreover, studies show that when the local density gradient of the simulated flow is large, it will cause numerical divergence if the second order central difference scheme of the mass conservation equation is used to update the information density. So the first order upwind scheme is recommended to update the information density for the flow with large density gradient.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第3期1276-1282,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10272066)资助的课题.~~
关键词
IP方法
低速流动
微尺度
变温流动
IP method, low flow, micro-scale, temperature variation flow