| 项目编号: | 1402702
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| 项目名称: | Fundamental Investigations for Very High Heat-Flux Innovative Operations of Milli-Meter Scale Flow Boilers |
| 作者: | Amitabh Narain
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| 承担单位: | Michigan Technological University
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| 批准年: | 2013
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| 开始日期: | 2014-06-15
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| 结束日期: | 2018-05-31
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| 资助金额: | USD305781
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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: | heat
; heat-exchange
; pulsation
; wave-trough
; heat-flux
; liquid film flow dynamics
; heat-generating device
; flow boiler
; liquid flow
; cbet-1402702high heat flux removal
; high heat-flux value
; heat-exchange surface
; entire heat-exchange surface
; heat exchange surface
; high heat-flux capability
; contact-line flow physics
; heated surface
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| 英文摘要: | CBET-1402702
High heat flux removal is of critical importance in a number of key applications such as electronic cooling or data center cooling (where heat generated by electronic processors or components have to be rapidly dissipated to keep them working reliably). One of the most effective ways of removing heat is through a phase change process such as boiling in cooling channels integrated on the back side of the heat-generating device. In electronic applications, the heat is typically generated at the chip-level, and due to the small sizes, significant functionality and boiling efficiency problems arise due to the vapor blocking the channel, and instabilities in the channel. The proposed research will focus on methods that will overcome the efficiency issues by ensuring a thin continuously evaporating film on the heated surface. Successful development of these methods will ensure improved reliability of computer and electronic devices and enable denser packaging and smaller footprint.
For the proposed study, high heat-flux capabilities are expected under externally imposed pulsations in the two phases (liquid and vapor). Thin and wavy boiling liquid films arise as a result of the pulsations, and cover the entire heat-exchange surface. Investigations will confirm if one can achieve high heat-flux values along the length of the flow boiler by a suitable adjustment of the mean quasi-steady film thickness profile (in the absence of pulsations) along with amplitude control of superposed waves (by controlling the amplitude of imposed pulsations). This is expected because the liquid film flow dynamics near the wave-troughs are dominated by the contact-line flow physics which causes the wave-troughs to "stick/dwell?" near the heat exchange surface. Therefore, under the proposed pulsatile operations, at most locations, the mean liquid film thickness will be significantly reduced and convection effects (in the liquid flow between the heat-exchange surface and the liquid-vapor interface) will be concurrently increased. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96617
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Amitabh Narain. Fundamental Investigations for Very High Heat-Flux Innovative Operations of Milli-Meter Scale Flow Boilers. 2013-01-01.
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