nanoHUB-U: Thermal Energy at the Nanoscale
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Understanding Phonon Dynamics via 1D Atomic Chains
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04 Apr 2006 | Online Presentations | Contributor(s): Timothy S Fisher
Phonons are the principal carriers of thermal energy in semiconductors and insulators, and they serve a vital role in dissipating heat produced by scattered electrons in semiconductor devices. Despite the importance of phonons, rigorous understanding and inclusion of phonon dynamics in...
Additional Tutorials on Selected Topics in Nanotechnology
23 Mar 2011 | Workshops | Contributor(s): Gerhard Klimeck, Umesh V. Waghmare, Timothy S Fisher, N. S. Vidhyadhiraja
Select tutorials in nanotechnology, a part of the 2010 NCN@Purdue Summer School: Electronics from the Bottom Up.
Electron Emission from Nanoscale Carbon Materials
15 May 2007 | Online Presentations | Contributor(s): Timothy S Fisher
Prior studies on electron emission show possibly beneficial effects ofnanoscale phenomena on energy-conversion characteristics. For example,recent work has shown that the electric field around a nanoscale fieldemission device can increase the average energy of emitted electrons. Weconsider here...
Thermal Transport Across Interfaces
23 Aug 2011 | Courses | Contributor(s): Timothy S Fisher
These lectures provide a theoretical development of the transport of thermal energy by conduction in nanomaterials, in which material interfaces typically dominate transport. The physical nature of energy transport by two carriers: electrons and phonons--will be explored.
Tutorial 1: Thermal Transport Across Interfaces - Phonons
15 Aug 2011 | Online Presentations | Contributor(s): Timothy S Fisher
Outline:Lattice vibrations and phononsThe vibrating stringInterfaces between dissimilar strings: acousticmismatchDiscrete masses and the vibrational eigenspectrumGeneral thermal transport theory
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Notes on the quantum of thermal conductance
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NCN@Purdue Tool Support We have identified a list of tools for which we commit the following level of service: monitor support tickets, questions, and wishlists and provide a response within one business day. fix simple bugs within a week. move long term projects and tool improvement...
1D Transient Heat Conduction CDF Tool
Analytic Solution for 1D Transient Heat Conduction The problem geometry and boundary conditions are shown below. An initially isothermal (Tinitial) semi-infinite medium is suddenly subject to a surface temperature Th.
CDF Tools for Heat Transfer
This page contains a directory of sub-pages that use Mathematica-based embedded CDF tools for solving analytical problems in heat transfer. To download the required, free CDF player click here Sub-Pages 1D Transient Heat Conduction CDF Tool Boundary Layer Flow Solution Fin Temperature CDF...
Fin Temperature CDF Tool
Calculation of Fin Temperature for Adiabatic Tip and Infinite Fins The following CDF tool calculates the normalized fin temperature (θ(x) / θbase) for two cases: Case 1: Adiabatic fin tip Case 2: Infinitely long fin In both cases, the cross sectional area of the fin is assumed...
ZT to COP Thermoelectric CDF Tool
Conversion of ZT of a Thermoelectric to Refrigeration COP The tool below is based on the Mathematical Computable Document Format (CDF). To download the required, free CDF player click here The tool uses the following formula for the ZT to COP (refrigeration) conversion: math_failure...