Equation of state of a partially homogenized plasma of low-dense porous matter

The equation of state (EOS) of a low-density porous substance plasma is proposed in the form of continuous media EOS containing, as a pressure control parameter, the degree of plasma homogenization. This parameter is a function of the initial porous structure as well as the current values of plasma density and temperature. Using the partially homogenized-plasma EOS, an approximate analytical solution is found and numerical calculations were performed of the problem of thermal expansion of a flat layer of porous matter. The features of the obtained results are discussed in comparison with the case of a homogeneous substance of equivalent chemical composition. The proposed equation of state is used to analyze the experimental data on thermodynamic state of porous substance heated with laser and x-ray pulses as well as energy transfer in such a substance by laser-supported ionization wave.