Abstract
This paper describes the difference in the splash formation owing to the solidity of an water drop.
In order to clarify the influence of solidity for the difference in the splash formation, and using some basic information concerning soil detaches, an experiment was performed using four factors with two levels-large and small levels: the diameter, the surface tension, the kinetic energy and the hardness of a colliding plane. The results are as follows.
1. The number of splashes differed with each falling range. It showed the peak in the vicinity of the colliding point, and decreased in order. This peak had a tendency to be raised and pointed near the colliding point, and to become gentle and low conversely in the distance. The former was suited to the splashes by the soft colliding plane and the latter was the hard plane.
2. The diameter of the splash differed with each falling point, and it showed a tendency to increase in distance. This tendency satisfied the following relation between diameter φ(mm) and range 1 (cm).
φ=a.eb.l (b>0)
However, as for the hard plane, large splashes were observed evidently close to the colliding point.
3. The average diameter of splashes had a large value as regards the water drops, large drops and hard colliding plane.
4. The specific diameter (the ratio of a splash diameter to a colliding drop diameter) was small for the large drops, so it showed the crushability of the large diameter drop. And it became small in the case of the solution drops, so the crushability of solution drop with less surface tension was affirmed.
5. The flying range l (cm) became long in the case of the hard colliding plane and the high kinetic energy level.
