In compact transistors, large electric fields near the drain side create hot spots whose dimensions are smaller than the phonon mean free path in the medium. In this paper, we present a study of unsteady hot spot behavior. The unsteady gray phonon Boltzmann transport equation (BTE) is solved in the relaxation time approximation using a finite volume method. Electron-phonon interaction is represented as a heat source term in the phonon BTE. The evolution of the temperature profile is governed by the interaction of four competing time scales: the phonon residence time in the hot spot and in the domain, the duration of the energy source, and the phonon relaxation time. The influence of these time scales on the temperature is investigated. Both boundary scattering and heat source localization effects are observed to have considerable impact on the thermal predictions. Comparison of BTE solutions with conventional Fourier diffusion analysis reveals significant discrepancies.
Skip Nav Destination
Article navigation
Technical Papers
Simulation of Unsteady Small Heat Source Effects in Sub-Micron Heat Conduction
Sreekant V. J. Narumanchi,
Sreekant V. J. Narumanchi
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907
Search for other works by this author on:
Jayathi Y. Murthy,
Jayathi Y. Murthy
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907
Search for other works by this author on:
Cristina H. Amon
Cristina H. Amon
Institute for Complex Engineered Systems and Department of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213
Search for other works by this author on:
Sreekant V. J. Narumanchi
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907
Jayathi Y. Murthy
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907
Cristina H. Amon
Institute for Complex Engineered Systems and Department of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division July 17, 2002; revision received June 3, 2003. Associate Editor: G. Chen.
J. Heat Transfer. Oct 2003, 125(5): 896-903 (8 pages)
Published Online: September 23, 2003
Article history
Received:
July 17, 2002
Revised:
June 3, 2003
Online:
September 23, 2003
Citation
Narumanchi , S. V. J., Murthy, J. Y., and Amon, C. H. (September 23, 2003). "Simulation of Unsteady Small Heat Source Effects in Sub-Micron Heat Conduction ." ASME. J. Heat Transfer. October 2003; 125(5): 896–903. https://doi.org/10.1115/1.1603774
Download citation file:
Get Email Alerts
Cited By
Estimation of thermal emission from mixture of CO2 and H2O gases and fly-ash particles
J. Heat Mass Transfer
Non-Classical Heat Transfer and Recent Progress
J. Heat Mass Transfer
Related Articles
An Improved Computational Procedure for Sub-Micron Heat Conduction
J. Heat Transfer (October,2003)
Sub-Continuum Simulations of Heat Conduction in Silicon-on-Insulator Transistors
J. Heat Transfer (February,2001)
Phonon Heat Conduction in Thin Films: Impacts of Thermal Boundary Resistance and Internal Heat Generation
J. Heat Transfer (April,2001)
Computation of Sub-Micron Thermal Transport Using an Unstructured Finite Volume Method
J. Heat Transfer (December,2002)
Related Proceedings Papers
Related Chapters
Short-Pulse Collimated Radiation in a Participating Medium Bounded by Diffusely Reflecting Boundaries
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
Introduction
Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow
Study on Load Position Switching of Radial Scattering Dispenser
International Conference on Mechanical Engineering and Technology (ICMET-London 2011)