COLLISION DYNAMICS OF A WATER DROPLET IMPINGING ON A RIGID SURFACE ABOVE THE LEIDENFROST TEMPERATURE

被引：47

作者：

HATTA, N ^{[1
]}

FUJIMOTO, H ^{[1
]}

TAKUDA, H ^{[1
]}

KINOSHITA, K ^{[1
]}

TAKAHASHI, O ^{[1
]}

机构：

[1] KYOTO UNIV,GRAD SCH,SAKYO KU,KYOTO 606,JAPAN

来源：

ISIJ INTERNATIONAL | 1995年 / 35卷 / 01期

关键词：

COLLISION DYNAMICS; WATER DROPLET; HOT SURFACE; WEBER NUMBER; DROPLET DEFORMATION; COEFFICIENT OF RESTITUTION;

D O I：

10.2355/isijinternational.35.50

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The collision dynamics of a water droplet impinging on a rigid surface above the Leidenfrost temperature are described from an experimental point of view. Emphasis is placed upon the collision of relatively small droplets in the range from 300 to 600 mu m with the surface. The surface temperature is fixed at 500 degrees C. The first purpose of the present study is to examine whether or not the prior empirical rules obtained by using droplets of 2 to 3 mm give an applicability to the case where the droplet size is much smaller. The second is to clarify the relation between the Weber number and the coefficient of restitution, when the droplet rebounds from the hot surface without disintegrating into a number of particles. Also, the maximum value of the diameter of droplet which can spread on the surface and the resident time are examined and discussed by comparing the result obtained here with the prior empirical formulae proposed by a few researchers.

引用

页码：50 / 55

页数：6

共 10 条

[1]

AKAO F, 1980, T IRON STEEL I JPN, V20, P737

[2] OBSERVATIONS OF DROPLET IMPINGEMENT ON A CERAMIC POROUS SURFACE [J].