A new parameter unifying criterion for rectangular surface structure influences on vaporization nucleation: A molecular dynamics study

IF 6.1 2区 工程技术 Q2 ENERGY & FUELS
Xiaojia Li , Wei Deng , Song Ni , Guopeng Yu , Jiyun Zhao , Pingjian Ming
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引用次数: 0

Abstract

This study investigates the nucleation behavior on nanostructured surfaces and its impact on heat transfer efficiency. The significance of this research lies in the fact that accurate characterization of surface effects is crucial for optimizing heat transfer systems, which have profound implications for various industrial applications. Using molecular dynamics methods, we systematically analyze the influence of rectangular surface structures with varying heights, widths, and densities on nucleation behavior. Our findings reveal that traditional surface roughness metrics fail to capture critical surface details, limiting their ability to accurately describe the effects of different surfaces on nucleation. Furthermore, we observe that surface structures significantly influence nucleation by altering local liquid film thicknesses. To address these limitations, we propose a novel parameter that combines corrected effective liquid film thickness with surface roughness to provide a more comprehensive characterization of the nucleation process. Through computational modeling, we validate the effectiveness of this parameter in predicting heat flux density, heat transfer coefficient, and surface thermal resistance across different rectangular surface structures. The results of this study clarify the mechanisms through which surface structures affect nucleation, offering a more precise tool for characterizing these effects. This enhanced understanding not only advances the theoretical framework of nucleation science but also has practical implications for the design of more efficient heat transfer systems in various industrial settings. The novelty of this work lies in the introduction of a new parameter that surpasses previous efforts in the literature by providing a more accurate quantitative prediction of the impact of surface structures on nucleation and heat transfer efficiency.
矩形表面结构对汽化成核影响的一个新的参数统一准则:分子动力学研究
研究了纳米结构表面的成核行为及其对传热效率的影响。本研究的意义在于,准确表征表面效应对于优化传热系统至关重要,这对各种工业应用具有深远的意义。利用分子动力学方法,系统分析了不同高度、宽度和密度的矩形表面结构对成核行为的影响。我们的研究结果表明,传统的表面粗糙度指标不能捕捉到关键的表面细节,限制了它们准确描述不同表面对成核的影响的能力。此外,我们观察到表面结构通过改变局部液膜厚度显著影响成核。为了解决这些限制,我们提出了一个新的参数,该参数结合了校正后的有效液膜厚度和表面粗糙度,以提供更全面的成核过程表征。通过计算建模,我们验证了该参数在预测不同矩形表面结构的热流密度、换热系数和表面热阻方面的有效性。本研究的结果阐明了通过表面结构影响成核的机制,为表征这些影响提供了更精确的工具。这种增强的理解不仅推进了成核科学的理论框架,而且对在各种工业环境中设计更有效的传热系统具有实际意义。这项工作的新颖之处在于引入了一个新的参数,通过对表面结构对成核和传热效率的影响提供更准确的定量预测,超越了以往文献中的努力。
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来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
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