A model for droplet evaporation near Leidenfrost point

被引：16

作者：

Xie, Heng ^{[1
]}

Zhou, Zhiwei ^{[1
]}

机构：

[1] Tsing Hua Univ, Inst Nucl Energy Technol, Div 103, Beijing 100084, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 25-26期

关键词：

Leidenfrost temperature; evaporation; drop impingement; theoretical analysis;

D O I：

10.1016/j.ijheatmasstransfer.2007.03.028

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The droplet evaporation process after impinging on a solid wall near Leidenfrost point is theoretically analyzed. Considering the change of heat transfer effective in the evaporation process, it is divided into recoil stage and spherical stage, and the heat transfer models in these two stages are built, respectively. The effect of initial Weber number, initial droplet diameter, solid surface superheat and wettbility are included in the models. A correlation for predicting evaporation lifetime is obtained based on the theoretical analysis and experimental results. By comparing analysis results with experimental data, it is concluded that the evaporation process can be predicted by present model. The results imply that Leidenfrost point may be not the turning point of heat transfer mechanism. The effect of drop size and Weber number are also analyzed. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5328 / 5333

页数：6

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