Non-isothermal rarefied gas flow in microtube with constant wall temperature

In this paper, pressure-driven gas flow through a microtube with constant wall temperature is considered. The ratio of the molecular mean free path and diameter cannot be negligible. Therefore, rarefaction taken into account. A solution obtained for subsonic as well slip continuum flow. Velocity, pressure, fields are analytically attained by macroscopic approach, using continuity, Navier-Stokes, energy equations, first order boundary conditions velocity temperature. Characteristic variables expressed in form perturbation series. approximation stands to second one reveals effects rarefaction, inertia, dissipation. Solutions compressible incompressible presented compared available results from literature. good matching has been achieved. This enables proposed method solving other flows, which common various engineering, biomedicine, pharmacy, etc. main contribution paper integral treatment several important such compressibility, field variability, viscous dissipation solutions. Since solutions analytical, they useful easily applicable.