| 项目编号: | 1512163
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| 项目名称: | UNS: Experimental and Theoretical Investigation of Thin Film Evaporation in Superhydrophobic-Superhydrophilic Hybrid Micro\Nanotextures |
| 作者: | Jiangtao Cheng
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| 承担单位: | University of North Texas
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| 批准年: | 2014
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| 开始日期: | 2015-09-01
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| 结束日期: | 2015-08-31
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| 资助金额: | USD271985
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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: | surface
; micro-piv
; thin film evaporation
; film evaporation heat transfer
; liquid evaporation
; thin liquid film
; thin film thickness
; micro/nano porous bi-wick structure
; rapid evaporation
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| 英文摘要: | Because liquid evaporation takes away a large amount of heat from a surface, rapid evaporation is desirable. The research team will fabricate new types of surfaces from which thin liquid films can evaporate faster than in a typical boiling process. As a consequence, these surfaces enable removing heat at very high rates which is demanded in many industrial applications. Not only graduate students but also K-12 students from the Dallas area will be involved in this project.
Thin film evaporation in capillary wicking structures can potentially yield higher heat transfer rates as compared to those of nucleate boiling. To further enhance the film evaporation heat transfer, the PI proposes to explore a novel avenue with the help of electro-wetting on dielectric (EWOD) to initiate and sustain thin film evaporation in micro/nano porous bi-wick structures decorated on hot spot surfaces. The PI will first develop multi-scale textured surfaces with micro- and nano-scale structures with treatments to make them super-hydrophobic or super-hydrophilic. The EWOD fluidic operations will be used to generate precisely controlled liquid volume on the surface. The project will be concentrated on detecting fluid meniscus distributions and wetting flow dynamics, using micro-PIV (particle imaging velocimetry) on different surface structures to determine the interdependency of the surface texturing on the wicking dynamics and thin film thickness in the presence of high heat fluxes and the effect of surface texturing on heat transfer rates. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93585
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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: | |
Jiangtao Cheng. UNS: Experimental and Theoretical Investigation of Thin Film Evaporation in Superhydrophobic-Superhydrophilic Hybrid Micro\Nanotextures. 2014-01-01.
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