An extended thermodynamics description of stationary heat transfer in binary gas mixtures confined in radial symmetric bounded domains

In this paper, we describe the stationary heat transfer problem in non-reacting gas mixtures confined between two coaxial cylinders or two concentric spheres kept at different temperatures. For the description of this phenomenon, we refer to the extended thermodynamics 13-moments single temperature system and we compare its predictions with those obtained by the classical Navier-Stokes-Fourier-Fick approximations. In contrast with the classical theory, we show that extended thermodynamics takes over also thermodiffusion effects, predicts boundary layers for the common temperature and non-vanishing stress tensors. Furthermore, we compare the results with those already obtained in the planar case, in order to point out the effects of the radial dependence.