Calculation of Forced-Air Cooling of Electronic Modules With a Two-Fluid Model of TurbulenceSource: Journal of Electronic Packaging:;1996:;volume( 118 ):;issue: 004::page 250Author:O. J. Ilegbusi
DOI: 10.1115/1.2792160Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flow and heat transfer characteristics in a forced-air cooled electronic device are calculated with a two-fluid model of turbulence. The fluids are defined as turbulent and nonturbulent, and precludes the need for low-Reynolds number model in the near-wall regions. Transport equations are solved for the zone-averaged variables of each fluid. Empirical relations, established in prior work, are used to express interchange of mass, momentum, and energy at the interface. Gradient-diffusion flux is considered an intrafluid source of turbulence. Several cases are considered showing effects of Reynolds number and heat-dissipation density on the flow and thermal fields. A critical comparison is made between the results based on the application of this model and the conventional k -ε model. Such results include velocity vectors and temperature distribution. In addition, the two-fluid model predicts spatial distribution of the intermittency factor, which provides a measure of the extent of turbulence and mixing in the electronic system.
keyword(s): Cooling , Fluids AND Turbulence ,
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contributor author | O. J. Ilegbusi | |
date accessioned | 2017-05-08T23:49:48Z | |
date available | 2017-05-08T23:49:48Z | |
date copyright | December, 1996 | |
date issued | 1996 | |
identifier issn | 1528-9044 | |
identifier other | JEPAE4-26156#250_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/116763 | |
description abstract | The flow and heat transfer characteristics in a forced-air cooled electronic device are calculated with a two-fluid model of turbulence. The fluids are defined as turbulent and nonturbulent, and precludes the need for low-Reynolds number model in the near-wall regions. Transport equations are solved for the zone-averaged variables of each fluid. Empirical relations, established in prior work, are used to express interchange of mass, momentum, and energy at the interface. Gradient-diffusion flux is considered an intrafluid source of turbulence. Several cases are considered showing effects of Reynolds number and heat-dissipation density on the flow and thermal fields. A critical comparison is made between the results based on the application of this model and the conventional k -ε model. Such results include velocity vectors and temperature distribution. In addition, the two-fluid model predicts spatial distribution of the intermittency factor, which provides a measure of the extent of turbulence and mixing in the electronic system. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Calculation of Forced-Air Cooling of Electronic Modules With a Two-Fluid Model of Turbulence | |
type | Journal Paper | |
journal volume | 118 | |
journal issue | 4 | |
journal title | Journal of Electronic Packaging | |
identifier doi | 10.1115/1.2792160 | |
journal fristpage | 250 | |
journal lastpage | 257 | |
identifier eissn | 1043-7398 | |
keywords | Cooling | |
keywords | Fluids AND Turbulence | |
tree | Journal of Electronic Packaging:;1996:;volume( 118 ):;issue: 004 | |
contenttype | Fulltext |