摘要或動機

It is always fascinating to see water droplet’s dancing around on a Japanese teppanyaki
hotplate surface. The water usually does not evaporate immediately, but form interesting
shapes, dance around and follow by evaporation of gaseous water and disappear. In
this experiment, we designed a very simple experimental set-up to observe the little
water droplets dancing on a heated hotplate. A homemade stainless plate and a small
heater attached to the plate, and a thermal couple was assembled. With this simple
setup, we observed the variation of water droplet’s shape as a function of the hotplate
temperatures. The temperature of the water droplets, the duration of the water on
the hotplate, and the shape number were measured. The shape formation mechanism
was proposed. We found when the water droplet was subject to high heat due to the
contact of the surface and the hotplate, the abrupt evaporation of the water molecules
and violent vibration cause the formation of the various shapes to reach thermal
equilibrium; the number of the shapes and the oscillation can be described by Laplace’s
equation,Using a high-speed camera, we
found the higher the temperature of the water, the more variations of the water
droplet shapes can be observed. In addition, at a certain temperature range, the
number of the water shapes did not change, suggesting a similar phase transformation
behavior on the shape formation.

緣起： 邂逅專題研究、水珠漫舞、剪輯影片，引起我們想更進一步揭開它的神秘面紗。

緣續： 了解熱平台上水滴大小的變化及水珠基本的形狀及變化律動。

緣繫： 進一步研究水珠多變的面貌，並探討水珠的大小、溫度、停滯時間及變化規律相關機制。

緣定： 糾纏在水珠圓舞曲中有如大珠小珠落玉盤的曼妙，其中埋藏了平均圓與能量量子化的律動。