Abstract
The Navier-Stokes transport coefficients for a granular gas of smooth inelastic hard disks or spheres are determined from the inelastic Boltzmann equation by means of Grad's moment method. The shear viscosity η, the thermal conductivity κ and the new transport coefficient μ (not present for elastic collisions) are explicitly obtained as nonlinear functions of the (constant) coefficient of restitution α. The expressions of η, κ, and μ agree with those previously obtained from the Chapman-Enskog method by using the first Sonine approximation. A comparison with previous results derived from Grad's moment method for two and three dimensions is also carried out.
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