Experimental study on effect of relative humidity on heat transfer of an evaporating water droplet in air flow

被引:30
作者
Fujita, Akitoshi
Kurose, Ryoichi [1 ]
Komori, Satoru
机构
[1] Kyoto Univ, Dept Mech Engn & Sci, Kyoto 6068501, Japan
基金
日本科学技术振兴机构;
关键词
Heat transfer; Evaporation; Droplet; Humidity; LIFT FORCES; DRAG;
D O I
10.1016/j.ijmultiphaseflow.2009.10.004
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Dispersed water droplets are often seen in environmental air flows in rain, cloud, mist, sea spray and so on. it is therefore of great importance to precisely estimate heat transfer between water droplets and atmospheric air in developing a reliable climate model. The purpose of this study is to fabricate the measurement system for the temperature of a small water droplet in air flow under the controlled relative humidity condition and to investigate the effect of relative humidity on heat transfer across the surface of an evaporating water droplet in air flow. The results show that the droplet temperature decreases in the low-relative-humidity condition, whereas it increases in the high-relative-humidity condition. Nusselt number on the droplet surface is not affected by the relative humidity. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:244 / 247
页数:4
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