CONDUCTION-BY THE CONTACT WITH ANOTHER BODY (SOLID, LIQUID, GAS) CONVECTION-BY THE MOTION OF HOT MATERIAL (LIQUID OR GAS) RADIATION-BY THE TRANSFORMATION OF THERMAL ENERGY INTO ELECTROMAGNETIC WAVES THAT ARE RE-TRANSFORMED INTO HEAT UPON ABSORPTION
Heat energy is transmitted from burning to unburned fuels by: Convection - Transfer of heat by the movement of masses of hot air; the natural direction is upwards in the absence of any appreciable wind speed and/or slope Radiation - Transfer of heat in straight lines from warm surfaces to cooler surroundings Conduction - Transfer of heat through solid matter Ember Transport - This is the transfer of heat resulting from firebrands being transported ahead of a fire by the wind, by gravity (e g rolling downhill) or being carried aloft in the convection column or by a fire whirl (i e spotting)
Heat transfer is the macroscopics transfer of energy that cannot be accounted for by any of the macroscopic work modes Heat is energy transferred across the boundary of a system due to a difference in temperature between the system and the surroundings of the system A system does not contain heat, it contains energy, and heat is energy in transit
the transmission of thermal energy from a location of higher temperature to a location of lower temperature This can occur by conduction, convection, or radiation
The process of thermal energy flowing from a body of high energy to a body of low energy Means of transfer are: conduction; the two bodies contact Convection; a form of conduction where the two bodies in contact are of different phases, i e solid and gas Radiation: all bodies emit infrared radiation
The transfer of thermal energy from one material to another by means of thermal conduction, convection or radiation; heat transfer is possible only from a high to a low temperature level