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Unformatted text preview: ISTANBUL TECHNICAL UNIVERSITY Faculty of Mechanical Engineering MAK 411E Experimental Methods in Engineering Heat Conduction Okan INAR Energy Division Group - 1 030040110 INTRODUCTION Heat (symbolized by Q ) is a form of kinetic energy produced by the motion of atoms and molecules. It can be transferred between objects by radiation, conduction and convection in gaseous, liquid or solid medias. Heat conduction or thermal conduction is the spontaneous transfer of thermal energy through matter, from a region of higher temperature to a region of lower temperature, and acts to equalize temperature differences. It is also described as heat energy transferred from one material to another by direct contact. In order to determine the amount the heat transferred by the heat conduction, it is used an equation called The Fourier Equation . Q kA x = - (W) Heat(Q) conducted through an area (A) is proportional with a material constant called conductivity(k) and the temperature gradient. While distance increases, temperature decreases and heat flux is always in the direction of decreasing temperature. So for that, right side of equation has a negative sign....
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This note was uploaded on 10/28/2010 for the course MECHANICAL mak354 taught by Professor Muratçakan during the Winter '08 term at Istanbul Technical University.

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