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Convective Heat Transfer Calculator
Transfer of heat from one place to another due to the molecular movement of fluids (Air or liquid) is known as convective heat transfer.
When molecules move from one place to another they carry heat with them.
Natural convection is the transfer of heat due to movement of liquid or air molecules without external sources such as a pump or fan.
It occurs because of Buoyancy Forces generated due to liquid or air molecules density differences.
This density difference is caused by the molecule’s temperature difference.
In Forced convective heat transfer, flow of fluid/air is caused by an external force such as fan or Pump.
Forced convection is used to increase the rate of heat transfer compared to natural convection. For example,
Air conditioner cools the room by using forced convection. If we increase AC fan speed, cooling increases because
of increased in forced convection.
|
| Type of Convection |
Convective Heat Transfer Coefficient |
| Air, free |
2,5 - 25 |
| Air, forced |
10 - 500 |
| Liquids, forced |
100 - 15000 |
| Aluminium |
205 |
| Copper |
385 |
| Iron |
79.5 |
| Steel |
50.2 |
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