When hot water comes in contact with cold water , the hot water from the bottom of the vessel is hot and so reduces its density. So low density ware goes up and cold water from side or above replaces the space. This is how Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.
The process of heat transfer from one part of a fluid to another part by the actual movement of the particles of the fluid is called convection. Liquid and gases are heated by the process of convection.
When hot water comes in contact with cold water , the hot water from the bottom of the vessel is hot and so reduces its density. So low density ware goes up and cold water from side or above replaces the space. This is how Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.
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