Abstract
Condensation of pure vapor inside a horizontal tube is investigated for a stratified two-phase flow. The proposed theoretical model takes into account the effect of the equivalent gravitational and interphase friction forces applied to the condensate film on film hydrodynamics. A numerical model is developed to study the motion of the film due to liquid removal from the vapor flow and to permit the determination of the average local and overall heat transfer coefficients. A simulation is made of the effects of vapor velocity, saturation temperature level and driving temperature difference on the intensity of the process. Our results are compared with those obtained by another theoretical model and are found to be in better agreement with the reported experimental data and give a coherent description of heat transfer mechanisms.
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