2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85840A continuum one-dimensional model of the plane Couette-Poiseuille flow is developed to describe the pressure distribution in a drag stage of molecular pump of either the Gaede or Holweck type. In spite of its simplicity and approximate nature the model provides a good qualitative representation of the drag pump operation in the whole range of the regimes from the continuum to free molecular ones.2 pages, 1 figure; presented as abstract #151 at 23rd International Symposium on Rarefied Gas Dynamics, Whistler, BC, Canada, 21 - 25 July, 2002Fluid Dynamicstext