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Shock-induced ejecta transport and breakup in reactive gas
Bao Wu1, FengChao Wu1, Pei Wang2
1CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China. wuha@ustc.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|June 25, 2020
Summary
Reactive gases significantly alter micro-ejecta transport. Chemical interactions in reactive gases cause more atom separation from aluminum ejecta, leading to smaller fragments and increased particle breakup compared to inert gases.
Area of Science:
- Materials Science
- Chemical Engineering
- Computational Physics
Background:
- Micro-ejecta transport in gases is crucial for understanding various physical phenomena.
- The behavior of ejecta in reactive environments remains less understood compared to inert conditions.
Purpose of the Study:
- To investigate the interaction between shock-induced aluminum (Al) ejecta and oxygen using reactive molecular dynamics.
- To elucidate the influence of chemical reactions on the transport and fragmentation of micro-ejecta.
Main Methods:
- Reactive molecular dynamics (MD) simulations were employed.
- Simulations focused on the interaction of Al ejecta with oxygen gas.
Main Results:
- Reactive gases significantly increase the temperature of the mixing zone, decelerate spikes, and enhance shock intensity compared to inert gases.
- In reactive gases, chemical interactions promote greater atom separation from ejecta particles, resulting in smaller fragments and more atomic particles.
- Compared to inert gases, reactive gases lead to more significant fragmentation and detachment of atoms from ejecta particles.
Conclusions:
- Chemical reactions play a critical role in the transport and breakup dynamics of micro-ejecta.
- Future ejecta-transport models must incorporate chemical reaction effects for improved predictive accuracy.
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