A description of the heat transfer in the space of dripping condensate on horizontal tube

There are many papers in literature concerning the conditions of the heat transfer during condensation on a horizontal bank of tubes, a typical element of a condenser. There is comparatively less information concerning the lower part of the tube on which we can no longer observe a run-off of a condensate but its dripping. The aim of this work is to carry out an analysis of heat transfer in this part of the tube. This analysis also involved supplementary experimental studies. These studies included film registration of a liquid flow on the tubes surface. The time of droplet formation as well as shapes will be predicted. Theoretical analysis of heat transfer in the lower part of tube was carried out by solving the set of momentum and energy equations. The determination of the droplet shape respected to sequence of time was a main aim of the presented analysis, where numerical calculation was conducted by the Lagrangian coordinate system