Wednesday, 1 February 2017

Heat Transmission and Fire spread

There are four ways in which heat can be transmitted:

1. Conduction
This involves transfer of heat without transfer of molecules (usually solid).

2. Convection
Convection is a process whereby  heat moves through a gas or liquid and involves actual movement of molecules.
Process showing conduction convection and radiation.

3. Radiation
Radiation is the mode of transfer of heat (as invisible waves through the air) from source, without any media. For example infrared, microwaves in microwave ovens.

4. Direct burning
Combustible material in contact with naked flame.


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