Explain the different modes of heat transfer.

1.	Explain the different modes of heat transfer.
Answer» The difference in temperature provides the necessary potential for heat transfer. There are three modes of heat transfer. These are conduction, convection and radiation. Conduction. Essentially heat is transferred within a stationary medium by conduction, viz. from particle to particle, whether it be solid, liquid or gas. Convection. In convection, there must be a bulk flow of the fluid. Heat is carried away from the wall surface by the flowing fluid. Convection, however, takes place in two ways, viz., forced convection and natural or free convection. In forced convection, the flow of the fluid is produced by an external source such as a pump or a fan. Radiation. In radiation, heat is transferred in the form of electromagnetic waves. For radiative heat transfer, therefore, the presence of a medium is not necessary.

Answer»

The difference in temperature provides the necessary potential for heat transfer.

There are three modes of heat transfer.

These are conduction, convection and radiation.

Conduction. Essentially heat is transferred within a stationary medium by conduction, viz. from particle to particle, whether it be solid, liquid or gas.
Convection. In convection, there must be a bulk flow of the fluid. Heat is carried away from the wall surface by the flowing fluid. Convection, however, takes place in two ways, viz., forced convection and natural or free convection. In forced convection, the flow of the fluid is produced by an external source such as a pump or a fan.

Radiation. In radiation, heat is transferred in the form of electromagnetic waves. For radiative heat transfer, therefore, the presence of a medium is not necessary.

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Explain the different modes of heat transfer.

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