Double Fire Tornado Yule Log (30 minute loop)
Happy holidays! Two differently colored flames rotate on a turntable with a tubular screen attached to it. The hot air from the flame rises up the tube, drawing fresh air that comes in from the sides to replace it. As air moves into the tube, the rotating screen deflects it slightly off-axis. As the air gets closer to the flame, conservation of angular momentum causes it to spin faster, forming a vortex characteristic of a tornado.