Аннотация:Flow of a diatomic rarefied gas in a capillary tube of infinite length and an arbitrary crosssection under a given small pressure gradient (Poiseuille flow) or a small temperature gradient (thermalcreep) is studied on the basis of a kinetic model that takes account for the rotational degrees of freedomof molecules (R-model). Numerical investigation is carried out for flows between parallel flat plates andin a circular capillary tube at the gas parameters corresponding to nitrogen. The main calculated quantityis the gas flow rate through a tube cross-section. The results are compared with the corresponding dataobtained on the basis of the S-model.