The propagation of high-frequency sound waves in binary gas mixtures flowing through
microchannels is investigated by using the linearized Boltzmann equation based on a
Bhatnagar-Gross-Krook (BGK)-type approach and diffuse reflection boundary conditions.
The results presented refer to mixtures whose constituents have comparable molecular
mass (like Ne-Ar) as well as to disparate-mass gas mixtures (composed of very heavy plus
very light molecules, like He-Xe). The sound wave propagation model considered in the …