Question

Explain different modes of heat transfer ​

Answer 1

Answer:

There are three modes of heat transfer: conduction, radiation, and convection. Conduction and radiation are fundamental physical mechanisms, while convection is really conduction as affected by fluid flow. ... Most other solids are essentially opaque to radiation.

Answer 2

The three types of heat transfer

Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation). Heat is usually transfered in a combination of these three types and seldomly occurs on its own.

3.Conduction

Conduction heat transfer is the transfer of heat by means of molecular excitement within a material without bulk motion of the matter. Conduction heat transfer in gases and liquids is due to the collisions and diffusion of the molecules during their random motion.

2.Convection

When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This type of heat transfer is called convection. The fluid above a hot surface expands, becomes less dense, and rises.

3.Radiation

Radiation is the fastest mode of heat transfer while conduction is the slowest mode of heat transfer. Radiation is defined as the mode of heat transfer which takes place through the vacuum and doesn't require any physical medium.