高压物理学报2011，Vol.25Issue(1)：23-28,6.
飞片加载产生正弦冲击波及其波阵面演化模拟
Numerical Study on the Viscosity of Shocked Al vis Small-Perturbation Amplitude Damping Profile Measurement by Flyer Impact
摘要
Abstract
Flyer-impact disturbance amplitude damping method of shock wave is one of practical method for viscosity measurement at high pressure and high temperature. The experimental results for shocked A1 at two high pressures have been reported previously by Li,et al,instead of the analytical solution method,which was proposed by Miller and Ahrens,for treating same characteristic data from the measured profiles that was adopted in Li's analysis. Here we first put forward a two-dimensional Eulerian viscous fluid, to make a full-shock front perturbation evolution simulation. The measured profile at 78 GPa is used as an example in our re-analysis. The numerical simulated profile agrees well with the measured one,from which the determined effective viscosity coefficient of the shocked A1 at 78 GPa is (2.8±0. 1)kPa · s. This value is about twice of the Li's one ((1.3±0.3)kPa · s),but we believe the value in the present study might be more reasonable because it is obtained from a comprehensive simulation for the full-shocked perturbation evolving process.关键词
粘性系数/二维Navier-Stokes方程/冲击波阵面/正弦形扰动Key words
viscosity coefficient/ two-dimensional Navier-Stokes equation/ shock front/ sinusoidal disturbance分类
数理科学引用本文复制引用
马小娟,刘福生,李一磊,于明,李永宏,彭小娟,经福谦..飞片加载产生正弦冲击波及其波阵面演化模拟[J].高压物理学报,2011,25(1):23-28,6.基金项目
国家自然科学基金(10974160,10576025,11002120) （10974160,10576025,11002120）
中央高校基本科研业务费专项资金资助(SWJTU09BR244) （SWJTU09BR244）
