Question

describe the process of convection in heat in long???

Answer 1

Thermal expansion of fluids may also force convection. In other cases, natural buoyancy forces alone are entirely responsible for fluid motion when the fluid is heated, and this process is called "natural convection". ... Such motion, in the presence of a temperature gradient, contributes to heat transfer.

Answer 2

the transfer of heat from one body to another body and from one part to another part by its actual movement is known as convection. this transfer of heat is done in liquids and gases