Semi-analytical calculations for parameters of boiling layer in isetropic expansion of warm dense matter with van der Waals equation of state

摘要

Features and parameters of \boiling" liquid layer, which arises underconditions of isentropic expansion of warm dense matter (WDM), are stud- iedwith the use of simplest van der Waals equation of state (EOS). Advan- tage ofthis EOS is possibility of demonstrable and semi-analytical descrip- tion ofthermo- and hydrodynamics of the process. Idealized self-similar case ofbehavior of matter on interception of equilibrium (not metastable) isoentropiccurve and boundary of gas-liquid coexistence curve (binodal) is analyzed. Thepossibility of formation of such "liquid layer" was studied previously in [1]during solving the problem of ablation of metal surface under the action ofstrong laser radiation. Peculiarity of such "freezing" of finite portion ofexpanding matter in the state, which corresponds to the binodal of gas-liquidor/and other phase transitions|so called "phase freezeout"and prospects ofapplications of this phenomenon for intended generation of uniform andextensive zone of previously unexplored states of matter were discussed in [2].