先进材料疑固实验室 Heat transfer Laboratory of Advanced Materials Solidification Thermal conduction is a transfer of heat (internal energy)by microscopic collisions of particles and movement of electrons within a body. Heat spontaneously flows from a hotter end to a colder end,or from a hotter body to a colder body. The law of heat conduction,also known as Fourier's law,states that the time rate of heat transfer through a material is proportional to the negative gradient in the temperature and to the area. q=-MAT HOT COLD (lots of vibration) (not much vibration) 号88892828 heat travels along the rod 上降充通大学 SHANGHAI JIAO TONG UNIVERSTTYHeat transfer Thermal conduction is a transfer of heat (internal energy) by microscopic collisions of particles and movement of electrons within a body. Heat spontaneously flows from a hotter end to a colder end or from Heat spontaneously flows from a hotter end to a colder end, or from a hotter body to a colder body. The law of heat conduction, also known as Fourier's law, states that the time rate of heat transfer through a material is proportional to the negative gradient in the temperature and to the area. q  T