lecture1 - 2.57 Nano-to-Macro Transport Processes Fall 2004...

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2.57 Nano-to-Macro Transport Processes Fall 2004 Lecture 1 1. Overview for nano sciences 1.1 Length scale 1.2 Examples in microtechnology 1.3 Examples in nanotechnology 1.4 Nano for energy (phonon, phonon, electron; wavelength, mean free path) 1.5 Nanoscale heat transfer in devices (e.g., CMOS) 1.6 Nano and microfabrication 1.7 Transport regimes 1.8 Overview of the book chapters and chapters to be covered 2. Classical Laws related to transport 2.1 Heat transfer 2.1.1 Conduction Fourier’s law: dT q =− k T or q =− k in one dimension dx where: q [W/m 2 ] is heat flux, k [W/m-K] is thermal conductivity. 2.1.2 Convection Newton’s law of cooling: = ( qh T T ) w a where: h [W/m 2 K] is heat transfer coefficient. T a y x T w Nonslip boundary condition is assumed at the wall, i.e., ( ( uy = 0) = u y ( y = 0) = 0 , Ty = 0) = T . x w Note: this assumption is NOT accurate for small scales. 2.1.3 Radiation Planck’s law: c 1 = e b , λ 5 ( e c 2 / T 1) 2.57 Fall 2004 – Lecture 1 1
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where: c 1 and c 2 are constants, λ is wavelength, and the subscript
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This note was uploaded on 02/27/2012 for the course MECHANICAL 2.57 taught by Professor Gangchen during the Fall '04 term at MIT.

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lecture1 - 2.57 Nano-to-Macro Transport Processes Fall 2004...

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