Thermal characteristics of tree-shaped microchannel nets with/without loops
Thermal characteristics of tree-shaped microchannel nets with/without loops
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DOI：
10.1016/j.ijthermalsci.2009.03.018
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发表时间：
2009-11
影响因子：
4.5
通讯作者：
P. Xu;Xiangrong Wang;A. Mujumdar;C. Yap;Bo-ming Yu
中科院分区：
文献类型：
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作者：
P. Xu;Xiangrong Wang;A. Mujumdar;C. Yap;Bo-ming Yu
几个树形微通道网络与/无回路的数值研究和比较，在电子元件的冷却应用。采用树状网络建立了微通道电子冷却系统的物理模型。树状微通道网嵌入盘形散热器中，该散热器附接到芯片以移除芯片散发的热量。通过数值模拟研究了总分支数和分支回路数对热沉系统传热和流动性能的影响。结果表明，当结构经历一个或多个通道段的意外损坏时，具有回路的树形网提供了很大的优势，因为回路确保了冷却剂流动的连续性。在一些分支的阻塞下，通道网络仅经历压降的增加，同时保持移除由芯片产生的热量的能力。
Several tree-shaped microchannel networks with/without loops are numerically examined and compared for application in cooling of electronic components. The physical model of microchannel electronic cooling system is set up with tree-shaped networks. The tree-shaped microchannel nets are embedded in a disk-shaped heat sink, which is attached to a chip to remove the heat dissipated by a chip. The effects of total branching level and loops on the thermal and flow performances of heat sink system are investigated numerically. Results show that tree-shaped nets with loops provide a great advantage when the structure experiences accidental damage to one or more channel segments since the loop assures continuity of coolant flow. Under blockage of some branches, the channel networks only experience an increase of pressure drop while maintaining the capability to remove the heat generated by the chip.