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首页> 外文期刊>International Journal of Heat and Mass Transfer >Laminar forced convection in a heat generating bi-disperse porous medium channel
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Laminar forced convection in a heat generating bi-disperse porous medium channel

机译：发热双分散多孔介质通道中的层流强迫对流

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摘要

Thermal management of heat generating electronics using the Bi-Disperse Porous Medium (BDPM) approach is investigated. The BDPM channel comprises heat generating micro-porous square blocks separated by macro-pore gaps. Laminar forced convection cooling fluid of Pr = 0.7 saturates both the micro-and macro-pores. Bi-dispersion effect is induced by varying the porous block permeability Da, and external permeability Da_E through variation in number of blocks N2. For fixed Re, when 10~(-5) ≤ Da_1 ≤ 1CT~2, the heat transfer Nu is enhanced four times (from ~200 to ~800) while the pressure drop Ap* reduces almost eightfold. For Da_1< 10~(-5), Nu decreases quickly to reach a minimum at the Mono-Disperse Porous Medium (MDPM) limit [Da_1 → 0). Compared to N~2 = 1 case, Nu for BDPM configuration is high when N2~ 》 1, i.e., the micro-porous blocks are many and well distributed. The pumping power increase is very small for the entire range of N~2. Distributing heat generating electronics using the BDPM approach is shown to provide a viable method of thermo-hydraulic performance enhancement X.
机译：研究了使用双分散多孔介质（BDPM）方法对发热电子设备的热管理。 BDPM通道包括由微孔间隙分隔的发热微孔正方形块。 Pr = 0.7的层流强制对流冷却液会同时浸入微孔和大孔。通过改变嵌段N2的数量来改变多孔嵌段的渗透率Da和外部渗透率Da_E，从而引起双分散效应。对于固定的Re，当10〜（-5）≤Da_1≤1CT〜2时，传热Nu增强了四倍（从〜200到〜800），而压降Ap *减小了近八倍。对于Da_1 <10〜（-5），Nu迅速下降，达到单分散多孔介质（MDPM）极限[Da_1→0）的最小值。与N〜2 = 1的情况相比，当N2〜》 1时，用于BDPM配置的Nu较高，即微孔块很多且分布良好。在整个N〜2范围内，泵浦功率的增加非常小。显示了使用BDPM方法分配发热电子设备，提供了一种提高热工液压性能X的可行方法。

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