Question

Define convection

Answer 1

Convection is a mode of heat transfer in which heat is transferred between a solid surface and a fluid (liquid or gas) through the movement of the fluid particles. This transfer of heat occurs as a result of the differences in temperature between the solid surface and the fluid. In convection, the fluid near the solid surface gets heated, becomes less dense, and rises, carrying heat away from the surface. Cooler fluid then replaces the rising fluid, creating a continuous circulation and transferring heat throughout the fluid. Convection is commonly observed in processes such as boiling water, wind currents, and atmospheric circulation.