Heat transfer is a process in which heat is transferred from a high-temperature object to a low-temperature object or from a high-temperature part of an object to a low-temperature part.
It is a common natural phenomenon in nature. As long as there is a temperature difference between objects or between different parts of the same object, heat transfer will occur and continue until the temperature is the same.
2. Heat transfer mode
Conduction: heat is transferred from the higher temperature part of an object to the lower temperature part along the object.
(conduction is the main way of heat transfer in solids)
Convection: the transfer of heat by the flow of liquid or gas.
(convection is the main way of fluid heat transfer)
Radiation: heat is emitted from an object in a straight line.
(Radiation heat transfer does not need any known medium, that is to say, radiation can be carried out in a vacuum. The heat of the sun is transferred to the earth by radiation. )
In general, three heat transfer modes are carried out at the same time, but in some cases, one of them is dominant.
That is to say, as long as there is a temperature difference between objects, the temperature can be balanced by these three ways of heat transfer.
No matter what state the object is; Whether there is a connection between objects.