화학공학 실험 중 `열 전도도 측정 실험` 예비 / 결과레포트입니다. 자세한 실험 결과를 토대로 책에 나와있는 각종 문제를 상세한 설명과 함께 풀이하였습니다. 한 문제도 빠트리지 않고 정확한 데이터와 함께 문제를 풀었습니다. 이 레포트만 있다면 `열 전도도 측정 실험` 예비 및 결과 레포트는 완벽하게 작성할 것입니다. 또한, 레포트의 마지막에 토의 내용도 있기 때문에 레포트 작성이 더욱 수월할 것이라 생각됩니다.
Conduction is the transfer of thermal energy between neighboring molecules in a substance due to a temperature gradient. It always takes place from a region of higher temperature to a region of lower temperature, and acts to equalize temperature differences. Conduction takes place in all forms of matter, viz, solids, liquids, gases and plasmas, but does not require any bulk motion of matter. In solids, it is due to the combination of vibrations of the molecules in a lattice and the energy transport by free electrons. In gases and liquids, conduction is 엳 새 the collisions and diffusion of the molecules during their random motion.
2. Heat flux
Heat flux or thermal flux, sometimes also referred to as heat flux density or heat flow rate intensity is a flow of energy per unit of area per unit of time. In SI units, it is measured in [W·m-2]. It has both a direction and a magnitude so it is a vectorial quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small.
Heat flux is often denoted , the subscript q specifying heat flux, as opposed to mass or momentum flux. The most important appearance of heat flux in physics is in Fourier`s law describing heat conduction.
- Unit Operation of Chemical Engineering, p251~272 Warren L. McCabe, Julian C. Smith, and Peter Harriot, McGraw-Hill,
- Chemical Engineering Laboratory Ⅱ, SungKyunKwan Univ. chemical Engineering.
- Fourier, J. The Analytical Theory of Heat, trans by A. Freeman. New York:Dover, 1955
- Transport Phenomena, Bird R. B., W. E. Stewart, and E. N. Lightfoot, Wiley, p245