Role of wire diameter size in the high voltage pulse wire explosion: Insights from molecular dynamics simulations
Open Access
- 1 June 2021
- journal article
- research article
- Published by AIP Publishing in AIP Advances
- Vol. 11 (6), 065109
- https://doi.org/10.1063/5.0052518
Abstract
We performed molecular dynamics simulations of the high voltage pulse explosion of single aluminum wires with the energy ratio of 0.6 in vacuum and studied the role of wire radial dimension. Simulation results show that large-diameter wires having a large material depth and a small specific surface can maintain a higher deposition energy density and effectively reduce the influence of the radial difference in thermodynamic parameters, leading to higher explosion velocity and a lower vaporization rate in the large-diameter wire. The most significant effect is that the larger diameter wire has a longer explosion development time. In addition, the propagation and reflection of the rarefaction waves in the wire result in two explosion regimes: the spinodal decomposition propagating inward from the surface and the cavitation boiling from the center to the surface. Increasing the diameter will increase the domination range of the spinodal decomposition mechanism.Keywords
Funding Information
- National Natural Science Foundation of China (61801201)
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