Analyticity of solutions to thermoviscoelastic diffusion mixtures problem in higher dimension

In this paper, we consider the linear theory of binary mixtures for thermoviscoelastic diffusion materials derived by Aouadi et al. (J Therm Stress 41:1414–1431, 2018). We establish the necessary and sufficient conditions to get a dissipation inequality for isotropic centrosymmetric materials. With the help of the semigroup theory of linear operators, we prove the well posedness of the higher-dimensional problem. Then, we show that the associated $C_0$-semigroup is analytic. Exponential stability and impossibility of localization of the solutions in time are immediate consequences.