Journal
ADVANCED MATERIALS
Volume 32, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201905117
Keywords
boundary layer; phase change; physical limit; supercapillary architecture; two-phase separation
Categories
Funding
- University of South Carolina (USC)
- National Science Foundation [CBET-1336443, ECS-0335765, ECS-1542174]
- National Aeronautics and Space Administration (NASA) [NNX14AN07A]
- Office of Naval Research (ONR) [N000141612307]
- National Natural Science Foundation of China [51475401]
- RGC General Research Fund [11275216, 11213414]
- U.S. Department of Defense (DOD) [N000141612307] Funding Source: U.S. Department of Defense (DOD)
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Development of smaller, faster, and more powerful electronic devices requires effective cooling strategies to efficiently remove ever-greater heat. Phase-change heat transfer such as boiling and evaporation has been widely exploited in various water-energy industries owing to its efficient heat transfer mode. Despite extensive progress, it remains challenging to achieve the physical limit of flow boiling due to highly transitional and chaotic nature of multiphase flows as well as unfavorable boundary layer structures. Herein, a new strategy that promises to approach the physical limit of flow boiling heat transfer is reported. The flow boiling device with multiple channels is characterized with the design of micropinfin fences, which fundamentally transforms the boundary layer structures and imparts significantly higher heat transfer coefficient even at high heat flux conditions, in which boiling heat transfer is usually deteriorated due to the development of dryout starting from outlet regions and severe two-phase flow instabilities. Moreover, the approaching of physical limit is achieved without elevating pressure drop.
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