摘要
把解决多物质流问题的Ghost Fluid方法应用到具有运动边界的单物质流的数值模拟中去,结合求解界面追踪问题的Level-Set方法,提出了有效求解运动边界问题的虚拟流体算法,用数值模拟重现了"声学整流"效应现象,并用等压装配法解决了发生在流体和活塞界面上的"Overheating"效应.数值实验表明:水平管道的长度和活塞振动频率是射流形成的关键因素,数值实验中如果频率和长度设置合理,则理想气体在做简谐振动的活塞驱动下,可以产生稳定的射流.
In this paper,Ghost Fluid method was applied into one-material fluid numerical simulation for jet problem of motion boundary condition.Combined with Level-Set method for front tracking,a kind of Ghost Fluid method is proposed to simulate the ＂acoustic streaming＂ effect,and a new kind of isobaric-fix formulation is constructed to eliminate the ＂overheating＂ effect happening on the interface of the piston.Numerical experiments show that the vibration frequency of the piston and the length of the pipe are the two key factors which influence the taking place of jet flow.If the two key factors are set properly,steady jet flow will happen in our numerical experiments with ideal gas driven by piston in simple harmonic oscillation.
出处
《南京信息工程大学学报（自然科学版）》
CAS
2010年第3期216-220,共5页
Journal of Nanjing University of Information Science & Technology（Natural Science Edition）
基金
公益性行业(气象)专项基金(GY-HY-200806029)
