Numerical solution for turbulent film condensation from vapor-gas mixtures in vertical tubes

The numerical model presented in this thesis deals with condensation in a vertical tube in the presence of a non-condensable gas. A vapor-gas mixture enters a tube of radius ro with a specified velocity uin, pressure Pin, gas mass fraction Win, and temperature difference Delta Tin between the inlet and the wall. The temperature of the tube wall is maintained lower than the inlet temperature resulting in steam condensation and a liquid film of thickness delta forming along the wall. The model is capable of handling both turbulent and laminar flow conditions. The model was derived from the full set of Navier-Stokes equations and the energy equation applied to both the core and the liquid film.;Turbulent results were obtained for a variety of inlet conditions and a parametric study was completed to determine the effects of the inlet parameters on both the film thickness and the local Nusselt number. Results showed similar trends as those found for laminar flow with the exception of the effect of inlet Reynolds number on the dimensionless film thickness. (Abstract shortened by UMI.)...