Lye soap is a cleaning product that is made using lard, water, and lye. It was historically used around the world before commercially produced soaps became commonly available, and is still used by many people because of its potential benefits for skin and because of its all-natural recipe.
Definition of Heat Transfer. Heat transfer, also referred to simply as heat, is the movement of thermal energy from one thing to another thing of different temperature.
Convection The method of heat transfer called convection occurs in fluidsâthat is, liquids and gases. It is usually a fairly rapid process. It depends upon the movement of the material that is heated. The motion is a result of changes in density (mass per unit volume) that accompany the heating process. Water in a teakettle is heated by convection.