Progress and Data Assessment of Shear Viscosity at Extremes for Warm and Hot Dense Matters

The viscosity of matter under extreme conditions, i.e., warm dense matter (WDM) and hot dense matter (HDM), has significant applications in various areas, such as the design of inertial confinement fusion targets, the study of astrophysical structure evolution, and the investigation of interfacial instability and mixing development under extreme conditions. Since the temperature and pressure range accessible by experimental techniques for viscosity measurement is very limited, the acquisition of viscosity data under extreme conditions mainly relies on theoretical calculations.This work provides viscosity dataset calculated from the random-walk shielding-potential viscosity model (RWSP-VM).

The matters include a variety of one-component materials with low to high atomic numbers (H, C, Al, Fe, Ge, W, U). The temperature and density ranges vary with the element. The specific list is as follows:H, temperature 0.2-2,000 eV, density 0.1-100 g/cm3;C, temperature 0.02-10,000 eV, density 0.1-100 g/cm3;Al, temperature 0.04-40,000 eV, density 0.27-27 g/cm3;Fe, temperature 0.4-100,000 eV, density 1.6-40 g/cm3;Ge, temperature 0.06-100,000 eV, density 0.53-53 g/cm3;W, temperature 0.2-1,000,000 eV, density 2.0-200 g/cm3;U, temperature 0.1-1,000,000 eV, density 1.893-189.3 g/cm3.RWSP-VM, which is based on physical modeling and independent of simulation data, has comparable accuracy to simulation data over a wide range of temperature and pressure, and is an efficient method for obtaining viscosity data of WDM and HDM.