What is a convective heat transfer?

Convective heat transfer is heat transfer by convection, heat transfer by means of fluid movement. Convective heat transfer may occur with one of the two main ways: natural convection and forced convection. These two heat transfer methods are distinguished by means of or lack of external devices to move the heated liquid around. In both cases, heat transmission is transmitted by fluid- such as liquid, gas or rheid flowing through solid mass. When the water near the heat source is heated, the molecules spread separately. This causes water to become less dense and hovering. The ascending water rises to the top of the pot and takes place. Colder water then heats up the heat source, becomes less dense and rises to the top.

This process results in a current called convection. In the case of boiling of water, it becomes a more visible wslepice is something like a macaron in a pot- one sees macarons moving up and down with a stream of convection. Unocial water is an example of natural convection.In this system, nothing except different water densities causes convective heat transfer. In fact, transmitting heat of natural convection works because heated liquids generally have lower density than colder liquids.

Unlike convection heat transfer caused by natural convection, heat transfer caused by forced convection is. Forced convection differs from natural convection due to the use of an external mechanism that moves the liquid around. This method of convection heat transfer does not require different fluid densities to function. Some examples of external mechanisms used in forced convection are pumps and fans. The heart is a natural example of such a device used in a forced convek.

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circulation system is one way people and some animals regulate their body temperatures. The heart is basically a pump and blood is a heated liquid. The heart drawsHeated liquid with blood vessels and towards the skin. The heat is then distinguished from the body by different means. This is one of the reasons why many desert animals have large ears - blood is able to circulate ears and distribute heat to the environment through different heat transfer methods.