Hydrodynamics from Grad's Equations: What Can We Learn From Exact Solutions

摘要

A detailed treatment of the classical Chapman-Enskog derivation of hydrodynamicsis given in the framework of Grad's moment equations. Grad's systems are considered as the minimal kinetic models where the Chapman-Enskog method can be studied exactly, thereby providing the basis to compare various approximations in extending the hydrodynamic description beyond the Navier-Stokes approximations. Various techniques, such as the method of partial summation, Pade approximants, and invariance principle are compared both in linear and nonlinear situations.