Modes of heat transfer
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There are three main modes of heat transfer: conduction, convection, and radiation. Conduction involves the transfer of heat between objects in direct contact through kinetic energy of electrons. Convection refers to the transfer of heat by the mixing and movement of heated fluid particles. Radiation involves the transfer of heat through electromagnetic waves that does not require a medium and can travel through space.
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Modes of heat transfer
- 1. Modes of heat transfer
- 2. What is heat transfer? Heat transfer is the transfer of energy from one region to another as a result of temperature gradient(dT/dx). Direction of heat transfer: from higher temperature to lower temperature.
- 3. modes of heat transfer 1. Conduction 2. Convection 3. radiation
- 4. Conduction Conduction is the transfer of heat from one part of a substance to another part of substance or any other substance which is in contact with it.
- 5. Conduction Reason of heat transfer: increase in kinetic energy of the free electrons of the matter. Conduction in fluids is much easier due to collision of molecules having high energy to those having low energy.
- 6. convection Convection is the transfer of heat within a fluid by mixing of one portion of fluid with another.
- 7. convection Reason for heat transfer: mixing of fluid, so that heat exchange occur from particles with higher temperature to those with lower temperature. 1. Free convection: mixing of fluid occur naturally due to difference in density of fluid that occur due to having different temperatures. 2. Forced convection: mixing of fluid occur using pumps or rotary motion.
- 8. Radiation (electromagnetic radiation) Radiation is the transfer of heat through space or matter by means of other than conduction or convection.
- 9. Radiation (electromagnetic radiation) Heat travelling by radiation is radiant heat. It require no medium for propagation, travels at light speed, possess particular wavelength, mostly invisible. Its nature is same as an electromagnetic wave or light.
- 11. Thank you reference: heat and mass transfer by r k rajput , heat and mass transfer by p k nag -by somen
- 12. modes of heat transfer
- 13. modes of heat transfer 1. Conduction 2. Convection 3. radiation Ppt in description Share to your friends who need it.