Open AccessExperimental analysis of the evaporation of a thin liquid film deposited on a capillary heated tube: estimation of the local heat transfer coefficient
Author(s) -
Luca Cattani,
Fabio Bozzoli,
Vincent Ayel,
Cyril Romestant,
Yves Bertin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2116/1/012110
Subject(s) - capillary action , evaporation , heat transfer coefficient , tube (container) , thermal conduction , heat transfer , materials science , thermodynamics , mechanics , heat flux , bubble , slug flow , mass transfer , heat pipe , work (physics) , flow (mathematics) , two phase flow , composite material , physics
The aim of this work is to estimate the local heat flux and heat transfer coefficient for the case of evaporation of thin liquid film deposited on capillary heated channel: it plays a fundamental role in the two-phase heat transfer processes inside mini-channels. In the present analysis it is investigated a semi-infinite slug flow (one liquid slug followed by one single vapour bubble) in a heated capillary copper tube. The estimation procedure here adopted is based on the solution of the inverse heat conduction problem within the wall domain adopting, as input data, the temperature field on the external tube wall acquired by means of infrared thermography.