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    Heat Transfer Methods

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    Talib Al_Munawri
    Director-General
    Director-General

    Posts : 337
    Join date : 2009-07-03
    Age : 30
    Location : Sultanate of Oman

    Heat Transfer Methods

    Post by Talib Al_Munawri on Mon Sep 07, 2009 7:47 pm

    Heat Transfer Methods


    CONDUCTION:

    This occurs when heat energy is passed through a material from one particle to the next. The particles at the warm end move faster and hit the particles next to them causing them to move faster, in this way heat is transferred by the vibrational movement of atoms.

    CONVECTION:

    This occurs when particles in a gas or liquid (that are free to move) become warm. When particles become warm they expand and become less dense, than the cold particles nearby. The warm particles then rise and the cooler particles fall into the space left behind by the warm particles. When this happens a convection current is set up.

    RADIATION:

    Radiation is the method of heat transfer that takes place without the need for a material to pass through (it can happen where there are no particles). It is the way that the Earth receives heat energy from the sun through the vacuum

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