Answer: Transfer of heat by convection can take place in gas and liquid.
Convective heat transfer involves the combined processes of advection and conduction. The convection of heat is divided into two types namely Free or natural convection and Forced convection.
Free or natural convection: In this, the density reduces with an increase in temperature, which results in fluid motion due to pressures and forces when fluids of different densities are affected by gravity. An example of natural convection is the upward flow of air due to a fire or hot object and the circulation of water in a pot that is heated from below.
Forced convection: In this a fluid is forced to flow over the surface by an internal source such as stirring, fans, and pumps, creating an artificially induced convection current. The thermal expansion of fluids comes under the category of forced convection.
Transfer of heat by convection can take place in?
Transfer of heat by convection can take place in gas and liquid.
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