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IC基板の自然空冷に関する研究

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概要 Experiments and numerical analyses are made on natural convection of air in a vertical channel, where one plate is attached by heat sources and the other is adiabatic. A practical type IC board (160^h...×115^wmm) is used, where twentyfive packages (3.7^h×19.3^l×6.7^wmm) are placed with equal interval. The channel height h, length l and heat flux q_w from the packages are varied in the ranges of l/h=5.5~22.9 and Gr=10^3~10^6. Two-dimensional Navier-Stokes and energy equations are solved for laminar air flow between vertical parallel plates, one of which has five rectangular heat sources. Calculations are made for parameter ranges that cover the experimental conditions. Flow and heat transfer characteristics in the parallel plates with heat source protrusions are demonstrated. Comparing the numerical solutions with experimental results for the local Nusselt number, the method is discussed to predict the surface temperature of packages on a practical IC board.続きを見る

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登録日 2009.04.22
更新日 2017.03.28