| 项目编号: | 1707056
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| 项目名称: | RUI: Two-dimensional flow-boiling characteristics under surface wettability gradient |
| 作者: | Yoon jo Kim
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| 承担单位: | Washington State University
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| 批准年: | 2017
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| 开始日期: | 2017-08-15
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| 结束日期: | 2020-07-31
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| 资助金额: | 263970
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | flow-boiling
; microgap surface
; 2-d
; surface wettability gradient
; heat transfer characteristic
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| 英文摘要: | As technology becomes increasingly miniaturized, extremely concentrated power consumption from advanced electronic devices leads to the challenge of how to keep devices from overheating. Conventional thermal solutions are inadequate for advanced high power density semiconductor devices for wireless and military applications. Flow-boiling, highly efficient phase-changing thermal energy conversion/transport phenomena, can be incorporated into microgap heat-sink technique as a promising thermal solution for high power density electronics. However, local excessive evaporations (dry-outs) by highly concentrated heat sources and consequent unevenness in flow distribution has been a challenging issue. In this project, microgap surface wetting property will be modified to address this issue; i.e., highly wetting surfaces imposed on hot-spots will enhance liquid-phase entrainment and thus prevent dry-out. The successful accomplishment of this project will advance fundamental knowledge in complex multiphase flow and heat transfer, enable cooling of futuristic electronic devices, and transfer state-of-the-art knowledge and experience to undergraduate and K-12 students.
The objective of this project is to attain fundamental knowledge about two-dimensional flow-boiling morphology and heat transfer characteristics under a surface wettability gradient. Despite the critical importance, the understanding of 2-D flow-boiling morphological behavior is very limited. Mere extension of 1-D theories cannot accommodate the 2-D complications and consequences. The proposed research tasks will investigate the 2-D flow-boiling morphology and vapor ebullition cycle, which will explain 2-D energy transport mechanisms related to the flow-boiling. The effect of multiphase forces on the vapor dispersion behaviors will be explored as well. Microgap surfaces with various wetting properties will be fabricated and tested to study how the induced capillary force modify the multiphase force balance and eventually affect 2-D flow-boiling phenomena. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89399
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Yoon jo Kim. RUI: Two-dimensional flow-boiling characteristics under surface wettability gradient. 2017-01-01.
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