A study of liquid microlayer during boiling in narrow vertical slot channels

摘要

This article presents the results obtained during a study of microlayer evaporation and its role in heat transfer during boiling in narrow slot channels. Experiments were run in a flat vertical channel. The distribution of microlayer thickness along the vertical radius was obtained form interferograms taken using a one-beam laser interferometer and high-speed photography. For the first time, the "nonevaporating" scenario of microlayer evolution, proposed by Moore and Mesler in 1961, was proved experimentally. Analytical examination of the microlayer formation process was carried out using the approach of Katto and Shoji, and taking into account the body force. The comparison of the results obtained, and published previously, is also presented in the article.