Abstract

An exact analytical solution has been developed to estimate the temperature distribution of the liquid rivulet. The analysis is based on solving the energy equation through the transformation of the rivulet cross-section having the shape of a circular sector into an infinite stripe with the help of the confoma| mapping method. When the results are related to those of the contńuous liquid film at the instant .of its breakdown, an increase in heat transfer coefficient is found for the adjacent rivulets, but if the rivulets are separated by dry distances a drop in heat transfer coefficient is obtained. The present study is also compared with an approximate solution for the flat liquid film.