Influence of Equation of State on Results of Hypervelocity Impact Modeling
Influence of Equation of State on Results of Hypervelocity Impact Modeling
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DOI：
10.1063/1.2263275
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发表时间：
2006-08
期刊：
影响因子：
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通讯作者：
I. Lomonosov;V. Fortov;V. Kim;A. Matveichev;A. Ostrik
中科院分区：
文献类型：
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作者：
I. Lomonosov;V. Fortov;V. Kim;A. Matveichev;A. Ostrik
采用“有限尺寸质点网格”方法对超高速碰撞进行了数值模拟。我们在3D设置中使用多相和简化的热量状态方程（EOS）对球形铅撞击器以6.6 km/s的速度穿透平板铅板进行了计算。这种冲击速度在冲击波中产生熔化，在释放波中产生强烈的蒸发。对撞击坑和碎片云的形成过程及其动力学进行了研究。数值模拟的结果，如内部空间的密度分布，碎片云的形式和空间大小，与实验X射线拍摄进行了比较。我们发现，气体动力学流动的参数，如压力和密度，对于多相和热量状态方程是不同的。应该注意的是，两种EOS都以良好的准确度描述了冲击波数据。分析表明，模拟结果的质量显着依赖于所使用的状态方程。
The numerical modeling of hypervelocity impact has been done with the use of method of “finite‐size particle in cell”. We carried out calculations using both multi‐phase and simplified caloric equations of state (EOS) in 3D setup for a spherical lead impactor penetrating flat lead plate with a velocity of 6.6 km/s. This impact velocity produces melting in the shock wave and a strong evaporation in the release wave. The processes of crater and debris cloud formation and their dynamics have been investigated. Results of numerical modeling, such as the density distribution in inner space, the form and spatial size of debris cloud, have been compared with experimental x‐ray shots. We found that parameters of gas dynamic flow, such as pressure and density, are different for multi‐phase and caloric EOS. One should note that both EOS describe shock‐wave data with good accuracy. The analysis proved that the quality of modeling results significantly depends on the equation of state used.