ESTUDO DA DIN AMICA DE UM G´AS CONFINADO EM PLACAS PARALELAS HETEROG ENEAS UTILIZANDO O MODELO S

Abstract

In this work, an analytical version of the method of discrete ordinates (ADO) is used in developing solutions to problems of rarefied gases confined by two infinite parallel plates with different chemical constitutions, that is, without the symmetry condition. The modeling of problems (Poiseuille Flow and Thermal Creep) are performed using the kinetic models of BGK and S, derived from the linearized Boltzmann equation. In order to describe the interaction between gas and surface, we use the core of Maxwell presenting a single accommodation coefficient and the Cercignani-Lampis core defined in terms of the coefficients of accommodation of tangential momentum and energy accommodation coefficient kinetics. A series of results are presented in order to establish a comparison of surface effects to the problems presented.