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A New Role of CFD Simulation in Thermal Design of Compact Electronic Equipment: Application of Build-Up Approach to Thermal Analysis of a Benchmark Model

[+] Author Affiliations
Wataru Nakayama

ThermTech International, Kanagawa, Japan

Ryuichi Matsuki, Yukari Hacho, Kiyoko Yajima

Shinko Electric Industries Company, Ltd., Nagano, Japan

Paper No. IMECE2003-42181, pp. 603-614; 12 pages
doi:10.1115/IMECE2003-42181
From:
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Electronic and Photonic Packaging, Electrical Systems and Photonic Design, and Nanotechnology
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Electronic and Photonic Packaging Division
  • ISBN: 0-7918-3714-9 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME

abstract

Computational Fluid Dynamics (CFD) codes have proved their high potential as a tool of thermal design of electronic equipment. However, as the product development cycle is shortened, the CFD-based thermal design needs a new format that allows the packaging designer fast and versatile searches for better design options. The most serious factor that slows the CFD-based design is geometric complexity created by various components packed in a tight space of the system box. In a proposed methodology coined ‘Build-up Approach (BUA)’ CFD simulations are conducted in advance of the start of actual hardware design to develop a body of temperature distribution solutions for possible components placements in the system box. Two algorithms are introduced before and after CFD simulations. One defines the geometric parameters through singular value decomposition (SVD) of components placement patterns, and the other identifies important geometric parameters for thermal management through application of the Taguchi method. A case study was conducted on a simple hardware model (benchmark model) that embodies essential features of portable electronic equipment. The results proved the effectiveness of these algorithms in measuring the relative importance of geometric parameters, and weeding out unimportant geometric details contained in actual equipment.

Copyright © 2003 by ASME

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