arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.03184cond-mat.mes-hallphysics.app-ph
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固-液和固-固界面局部界面热阻的分子动力学研究:水和纳米织构表面

Molecular Dynamic Study of Local Interfacial Thermal Resistance of Solid-Liquid and Solid-Solid Interfaces: Water and Nanotextured Surface

Yoshitaka Ueki, Satoshi Matsuo, Masahiko Shibahara

摘要:

空调和冰箱的性能下降是由表面上的结霜和粘附引起的。在本研究中,通过经典的分子动力学模拟,我们调查如何以及有多少纳米织构的表面特性,如表面润湿性和几何形状,影响固体壁和水/冰之间的界面热阻(ITR)。界面区域的ITR在水和冰的状态下是相当的。随着纳米结构间隙变窄,界面区域的ITR降低。局部ITR与局部H2O分子密度呈弱负相关,与H2O分子的相态无关。局部ITR随局部密度的增加而降低。当更多的H2O分子位于比第一吸附层峰更靠近Pt固体壁的邻近区域时,更大的热能通过分子间相互作用通过材料界面传递。当H2O分子在固体壁面上以晶体形式存在时,邻近分子减少,然后局部ITR显著增加。

英文摘要:

Degradation in performances of air conditioners and refrigerators is caused by a frost formation and adhesion on the surface. In the present study, by means of the classical molecular dynamics simulation, we investigate how and how much the nanotextured surface characteristics, such as surface wettability and geometry, influenced the interfacial thermal resistance (ITR) between the solid wall and the water/ice. The ITR of the interfacial region was comparable in both the water and the ice states. As the nanostructure gaps became narrower, the ITR of the interfacial region decreased. The local ITR had a weak negative correlation with the local H2O molecule density regardless of the phase of the H2O molecules. The local ITR decreased as the local density increased. The greater amount of the thermal energy was transferred through the material interface by means of the intermolecular interaction when more the H2O molecules were located in the proximity area, which was closer to the Pt solid wall than the first adsorption layer peak. When the H2O molecules were in the crystal form on the solid wall, the proximity molecules decreased, and then the local ITR significantly increased.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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