February 2021
Intermediate to advanced
184 pages
4h 7m
English
The movements of flames are governed by the movements of air currents above the fire. The hottest part of a fire is in the center and above this the hot air rises. As it rises it is replaced by colder air rushing inward from the sides. This air in its turn is heated and rises and so the process is continuous. This flow of air usually gives a roughly conical shape to the flames, with a succession of indentations representing eddies of cold air, starting at the base of the fire and moving inward and upward.
The timing of these movements is fastest at the base where the fire is hottest, slowing down on the way up. As the individual flames taper off, break up into smaller pieces and disappear, so should the speed. ...
Read now
Unlock full access