Is conduction faster than convection?

Heat Transfer Theory topics include: Heat conduction, heat convection and radiation.   Heat transfer theory describes the flow of heat energy due to temperature differences. It involves the exchange of momentum, energy, and mass in the form of conduction, convection, and radiation.  The theory of heat transfer is based on a few basic rules: Heat will always move from a hot medium to a cold medium. There must always be a temperature difference between the media. Heat transfer occurs only in the direction of decreasing temperature.  Heat transfer can occur in three ways: Conduction:... Show more

Heat Transfer Theory topics include: Heat conduction, heat convection and radiation.

 

Heat transfer theory describes the flow of heat energy due to temperature differences. It involves the exchange of momentum, energy, and mass in the form of conduction, convection, and radiation. 

The theory of heat transfer is based on a few basic rules:
Heat will always move from a hot medium to a cold medium.
There must always be a temperature difference between the media.
Heat transfer occurs only in the direction of decreasing temperature. 

Heat transfer can occur in three ways:
Conduction: Heat traveling through a solid material.
Convection: Heat transfer in liquids or gases in a state of motion, combining conduction with fluid flow.
Radiation: Heat transfer that takes place with radiation. 

Conduction is poorest in gases because their molecules are relatively far apart and so interact less frequently than in solids and liquids. 

The amount of heat transferred is linearly proportional to the ability of the material to conduct heat (k). 

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