MATHEMATICAL MODELS OF THE PROCESS OF LAMINAR STEAM CONDENSATION IN THE VERTICAL PIPES
The review of mathematical models of the process of laminar condensation of ascending and descending steam flow in the vertical pipes was presented. In the energy-conservation equations under ascending steam motion the process of heat transfer is often considered only in a broadside film direction; the convective heat transfer in condensate film and heat conductivity along the film is not taken into account. In the momentum conservation equations inertial forces are ignored as compared with the forces of viscosity, gravitation and friction on the boundary phases interface. Under the descending steam motion the ascending force is not taken into account in most works.