A Numerical Study of Forced-Convective Filmwise Condensation in a Vertical Tube

抄録

In order to theoretically approach forced-convective filmwise condensation in a vertical tube, we have numerically solved the governing equations for both water vapour flow and condensate film flow with a finite difference scheme. The effect of waves appearing at the vapour-film interface on momentum and heat transfer has been taken into account using a model previously proposed for the two-component two-phase annular flow heat transfer. The present numerical results are compared with the experimental data given by Blangetti. The computed heat transfer results agree fairly well with Blangetti's data for the condensation of water vapour over a wide range of film Reynolds number, 50<Re_f<2000, and for three different vapour flow Reynolds numbers. The present type of numerical analysis is found to be useful for the prediction of forced-convective condensation heat transfer.