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Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures

[Image: see text] In order to investigate the energy transfer mechanism and the nonequilibrium effect during water evaporation in its own pure vapor at low pressures, a series of precise measurements are conducted to obtain the temperature profile near the liquid–vapor interface and the evaporation...

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Autores principales: Guo, Rui-Feng, Zhang, Li, Mo, Dong-Ming, Wu, Chun-Mei, Li, You-Rong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7931419/
https://www.ncbi.nlm.nih.gov/pubmed/33681631
http://dx.doi.org/10.1021/acsomega.1c00134
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author Guo, Rui-Feng
Zhang, Li
Mo, Dong-Ming
Wu, Chun-Mei
Li, You-Rong
author_facet Guo, Rui-Feng
Zhang, Li
Mo, Dong-Ming
Wu, Chun-Mei
Li, You-Rong
author_sort Guo, Rui-Feng
collection PubMed
description [Image: see text] In order to investigate the energy transfer mechanism and the nonequilibrium effect during water evaporation in its own pure vapor at low pressures, a series of precise measurements are conducted to obtain the temperature profile near the liquid–vapor interface and the evaporation rates in an annular pool in a closed chamber. The results show that the interface temperature of the vapor side is higher than that of the liquid side when water evaporates in its own pure vapor at low pressures (ranging from 394 to 1467 Pa), the temperature discontinuity across the interface exists in all experimental conditions. The magnitude of the temperature discontinuity is strongly affected by the vapor pressure. A uniform temperature layer with a thickness of about 2 mm is found below the evaporating interface because of the coupling effect of evaporation cooling and thermocapillary convection. The energy required for evaporation is mainly transferred by thermocapillary convection in the uniform temperature layer. Furthermore, the numerical simulation results confirm that the evaporation flux near the cylinders is much larger than that at the middle region, which implies that most of the latent heat required for evaporation is transferred to the interface near the cylinders.
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spelling pubmed-79314192021-03-05 Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures Guo, Rui-Feng Zhang, Li Mo, Dong-Ming Wu, Chun-Mei Li, You-Rong ACS Omega [Image: see text] In order to investigate the energy transfer mechanism and the nonequilibrium effect during water evaporation in its own pure vapor at low pressures, a series of precise measurements are conducted to obtain the temperature profile near the liquid–vapor interface and the evaporation rates in an annular pool in a closed chamber. The results show that the interface temperature of the vapor side is higher than that of the liquid side when water evaporates in its own pure vapor at low pressures (ranging from 394 to 1467 Pa), the temperature discontinuity across the interface exists in all experimental conditions. The magnitude of the temperature discontinuity is strongly affected by the vapor pressure. A uniform temperature layer with a thickness of about 2 mm is found below the evaporating interface because of the coupling effect of evaporation cooling and thermocapillary convection. The energy required for evaporation is mainly transferred by thermocapillary convection in the uniform temperature layer. Furthermore, the numerical simulation results confirm that the evaporation flux near the cylinders is much larger than that at the middle region, which implies that most of the latent heat required for evaporation is transferred to the interface near the cylinders. American Chemical Society 2021-02-19 /pmc/articles/PMC7931419/ /pubmed/33681631 http://dx.doi.org/10.1021/acsomega.1c00134 Text en © 2021 The Authors. Published by American Chemical Society This is an open access article published under an ACS AuthorChoice License (https://creativecommons.org/licenses/by-nc-nd/4.0/) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Guo, Rui-Feng
Zhang, Li
Mo, Dong-Ming
Wu, Chun-Mei
Li, You-Rong
Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures
title Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures
title_full Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures
title_fullStr Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures
title_full_unstemmed Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures
title_short Study on Evaporation Characteristics of Water in Annular Liquid Pool at Low Pressures
title_sort study on evaporation characteristics of water in annular liquid pool at low pressures
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7931419/
https://www.ncbi.nlm.nih.gov/pubmed/33681631
http://dx.doi.org/10.1021/acsomega.1c00134
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