The Shape of Flame

Abstract

We observed in a room the shape of flame of alcohol burning in circular dishes (dia. 10～75cm).
The shape of a flame varies periodically. The period is short when the dish diameter is small, but increases gradually and tends asymptotically to a constant value as the diameter of dish becomes larger.
The burning velocity also increases with the dish diameter and tends to a certain constant.
The flame height is proportional to the diameter of the dish, and is about 1.6 times of the latter.