Al-Salman Assad
Univ. of Basrah, Iraq
S. V. Konev
A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus
Abstract
An analytical solution is presented to the problem of reflux condensation in two-phase closed thermosyphons, which leads to an expression for the average condensation heat transfer coefficient for all regimes of vapour and liquid flows inside the thermosyphon.
Dealing with different cross-sectional thermosyphons, this study indicates the characteristics of the condesate film and the effect of the vapour shear stress on it, especially in small cross-sectional pipes. Comparison with Nusselt's solution and other previous studies is made.