Capillary evaporation in tubes with different diameters

LI Hongru; CHEN Yan; CHENG Xu; DU Wenjing; YI Baokui; XIN Gongming

doi:10.11949/j.issn.0438-1157.20180750

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Capillary evaporation in tubes with different diameters

更新时间：2025-12-10

- Capillary evaporation in tubes with different diameters
- CIESC Journal Issue S1, Pages: 43-47(2018)
- 作者机构：
  
  1. 山东大学能源与动力工程学院,山东,济南,250061
  2. 山东省特种设备检验研究院有限公司,山东,济南,250101
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180750
  CLC： K124
- Online First：30 September 2018，
  
  Published：30 September 2018
- 稿件说明：
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LI Hongru, CHEN Yan, CHENG Xu, et al. Capillary evaporation in tubes with different diameters[J]. CIESC Journal, 2018, (S1): 43-47.
DOI：

LI Hongru, CHEN Yan, CHENG Xu, et al. Capillary evaporation in tubes with different diameters[J]. CIESC Journal, 2018, (S1): 43-47. DOI： 10.11949/j.issn.0438-1157.20180750.

摘要

以无水乙醇为工质，采用3种不同管径的圆形毛细管进行毛细蒸发实验。研究结果表明：毛细管毛细蒸发过程中，蒸发界面移动后会延展形成一层液膜，这层液膜可以大幅提高液体蒸发速率。这是因为液膜蒸发引起的温度变化会通过Marangoni效应转化为表面张力差，使液膜在蒸发的同时得到不断补充，形成高效的蒸发-补充机制。随管径增大，液膜厚度增加，蒸发稳定性变好，速率变化幅度减小。工质整体蒸发速率随管径变大呈递减趋势。

Abstract

The experiment was conducted to investigate the characteristic of capillary evaporation in capillary tubes with three different diameters using alcohol as working fluid. The results indicated that the evaporating interface with extend and form a thin liquid film during the evaporation

which can rapidly increase the evaporating rate. The temperature caused by the liquid film evaporation will change into the difference of surface tension because of the Marangoni effect

the liquid film will be supplemented while evaporating and form the high-effective “evaporation-supplement” mechanism. With the increase of the diameter

the liquid film become thicker and the stability is improved

the change rate of the interface moving rate decreased. Meanwhile

the overall evaporation rate decreases with the increasing of tube diameter.

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