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Modeling asymmetric cavity collapse with plasma equations of state

Tully, B; Hawker, N; Ventikos, Y; (2016) Modeling asymmetric cavity collapse with plasma equations of state. Phys. Rev. E , 93 (5) , Article 053105. 10.1103/PhysRevE.93.053105. Green open access

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Abstract

We explore the effect that equation of state (EOS) thermodynamics has on shock-driven cavity-collapse processes. We account for full, multidimensional, unsteady hydrodynamics and incorporate a range of relevant EOSs (polytropic, QEOS-type, and SESAME). In doing so, we show that simplified analytic EOSs, like ideal gas, capture certain critical parameters of the collapse such as velocity of the main transverse jet and pressure at jet strike, while also providing a good representation of overall trends. However, more sophisticated EOSs yield different and more relevant estimates of temperature and density, especially for higher incident shock strengths. We model incident shocks ranging from 0.1 to 1000 GPa, the latter being of interest in investigating the warm dense matter regime for which experimental and theoretical EOS data are difficult to obtain. At certain shock strengths, there is a factor of two difference in predicted density between QEOS-type and SESAME EOS, indicating cavity collapse as an experimental method for exploring EOS in this range.

Type: Article
Title: Modeling asymmetric cavity collapse with plasma equations of state
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevE.93.053105
Publisher version: https://doi.org/10.1103/PhysRevE.93.053105
Language: English
Additional information: © 2016 American Physical Society
Keywords: Science & Technology, Physical Sciences, Physics, Fluids & Plasmas, Physics, Mathematical, Physics,hot dense matter, of-state, dynamics, luminescence, single, bubble, scheme, argon, sonoluminescence, tracking
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1499877
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