The viscosity of charged particles in the weakly ionized plasma with power-law distributions

Abstract

We study the viscosity of light charged particles in weakly ionized plasma with the power-law q-distributions using the generalized Boltzmann equation of transport and the motion equation of hydrodynamics. The nonequilibrium plasma variables are considered to be space inhomogeneous and without magnetic field. We derive the expressions of the viscosity coefficients of electrons and ions in the q-distributed plasma, including the first and the second viscosity coefficients. It is shown that these new viscosity coefficients depend strongly on the q-parameters, and when we take q → 1, they perfectly return to those in the plasma with a Maxwellian distribution. The discussions presented in this paper can also be applied to the plasmas with the kappa-distributions.