三维晶格玻尔兹曼法增强改性表面池沸腾换热

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci230114121h

Qian Huang, Jing-zhi Zhou, Xiulan Huai, F. Zhou

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引用次数: 0

摘要

本文采用三维晶格玻尔兹曼方法(LBM)对微柱改性表面的池沸腾过程进行了数值模拟。系统评价了微柱的几何形状和润湿性对微柱沸腾换热性能的影响。结果表明:与微柱表面相比，立方微柱表面热流密度最大，壁面温度最低;此外，与亲水条件相比，疏水润湿性条件下立方微柱表面的热流密度提高了98.3%。这是因为疏水润湿性对成核位置密度、气液流场和传热性能的影响远大于立方几何形状。具有混合润湿性的立方微柱表面的热流密度比纯亲水润湿性提高了430.7%。这是因为最优的杂化润湿性表面可以控制成核位置，限制气泡生长，明显提高传热性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Enhancing pool boiling heat transfer of modified surface by 3D Lattice Boltzmann method

In this study, pool boiling from micro-pillar modified surface has been simulated numerically by a 3D Lattice Boltzmann method(LBM). Effects of geometries and wettability of micro-pillaron boiling heat transfer performance were also systematically evaluated. Result showed that compared with in micro-pillar surface, heat flux of cubic micro-pillar surface was the highest with the lowest wall temperature. In addition, compared to hydrophilic condition, Heat flux of cubic micro-pillar surface with hydrophobic wettability increased by 98.3%. This is because hydrophobic wettability influenced nucleation site density, vapor-liquid flow field and heat transfer performance much more than cubic shaped geometry. Finally, heat flux of cubic micro-pillar surface with hybrid wettability increased by 430.7% compared to pure hydrophilic wettability. That is due to optimal hybrid wettability surface could control nucleate site location, restrict bubble growth, and increase obviously heat transfer performance.

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.