TY - JOUR
T1 - Modeling asymmetric cavity collapse with plasma equations of state
AU - Tully, Brett
AU - Hawker, Nicholas
AU - Ventikos, Yiannis
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/5/12
Y1 - 2016/5/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84971329272&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.93.053105
DO - 10.1103/PhysRevE.93.053105
M3 - Article
C2 - 27300976
AN - SCOPUS:84971329272
SN - 2470-0045
VL - 93
JO - Physical Review E
JF - Physical Review E
IS - 5
M1 - 053105
ER -