Open AccessРежимы с интенсификацией теплообмена при испарении в тонких горизонтальных слоях жидкости при пониженных давлениях
Author(s) -
В.И. Жуков,
А.Н. Павленко
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.12.46285.17263
Subject(s) - boiling , evaporation , bubble , recoil , materials science , thermodynamics , nucleate boiling , dodecane , heat transfer , capillary action , impact crater , heat transfer coefficient , mechanics , chemistry , composite material , atomic physics , physics , organic chemistry , astronomy
The influence of structures formed during the evaporation and boiling of a liquid (n-dodecane) in thin horizontal layers on heat transfer has been analyzed. Structures shaped with the shapes of funnels and craters are formed at low pressures in liquid layers with thicknesses above the capillary constant under the action of a vapor recoil force. Increasing pressure leads to the onset of bubble boiling. It is established that the formation of these structures in the regime of intense evaporation at low reduced pressures leads to an about 70% increase in the heat-transfer coefficient at analogous layer thicknesses in comparison to the case of bubble boiling.