摘要
瑞利 泰勒不稳定性是一种由于密度梯度引起的界面不稳定性,在惯性约束聚变中具有重要的意义。利用被动标量输运模型对包含不同尺度初始扰动的界面演化过程进行数值模拟。计算结果表明界面的初始形状对不稳定性的发展具有很大的影响,狭长型扰动比正方型扰动发展慢。另外,不同尺度扰动的相互作用一般会减小沿界面发展方向运动的动能,使能量更多地用于平行于界面方向的运动。
The Rayleigh-Taylor instability caused by a density gradient is very important in the inertial confinement fusion. With the passive scalar transport model, behaviors of the interface with various initial length scales are simulated. It appears that the initial form has a significant influence upon the interfacial motion. Long grooves grow more slowly than square shaped perturbations. And generally the mixing process in the vertical direction may be decreased by the interaction between bubbles with different scales.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2003年第12期1195-1199,共5页
High Power Laser and Particle Beams
基金
SupportedbyNationalNaturalScienceProject(1 0 1 760 32 )
关键词
瑞利-泰勒不稳定性
被动标量输运模型
惯性约束聚变
多尺度
界面
Rayleigh-Taylor instability
Passive scalar transport modal
Inertial confinement fusion(ICF)
Multi-scale
Interface
