Numerical investigation of ejecta mass of twice-shocked liquid Sn

Author:

Wu Bao1ORCID,He AnMin1ORCID,Wang XinXin1ORCID,Sun HaiQuan1ORCID,Wang Pei12ORCID

Affiliation:

1. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics 1 , Beijing 100094, China

2. Center for Applied Physics and Technology, Peking University 2 , Beijing 100871, China

Abstract

In this paper, we investigate the ejection production from twice-shocked Sn using molecular dynamic simulations in regimes where the metal undergoes complete shock melting after the first shock. A new description form of a bubble shape is proposed to fit the interface during the whole stage, which overcomes the inapplicability of the flycut profile in later stages. We then explore the ejection on second shock with the dimensionless intervals of ∼3.8 and ∼96 between the two shocks. Surprisingly, the results show that the ejecta model can well predict the second ejecta mass with a shock interval of ∼3.8 while far underestimated that with a shock interval of ∼96. We find that in the presence of the first ejecta, the high-speed secondary interface interacts with the low-speed first ejecta, resulting in the movement of liquid metals to the secondary ejecta, thereby promoting the increase of secondary ejecta mass. These findings are further validated by our smoothed particle hydrodynamics simulations at a macroscale.

Funder

Foundation of National Key Laborotory of Shock Wave and Detonation Physics of China

National Natural Science Foundation of China

National Key R&D Program of China

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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