通过分子动力学模拟,研究不同形状和数量的表面粗度对纳米通道内的流体对流热传输的影响
1Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China.
Journal of molecular modeling
|January 16, 2024
概括
表面粗的形状和数量显著影响纳米流体流动和热传递. 三角粗度增强流体的速度和温度,而增加的粗度数量会降低它们,影响纳米通道的性能.
科学领域:
- 纳米规模的科学和技术.
- 流体动力学 流体动力学
- 热传递是一种热传递.
背景情况:
- 微/纳米技术的进步推动了工业,生物技术和IT中的纳米应用.
- 在纳米尺度上,纳米流体流动和热传输至关重要.
- 表面特征显著影响流体行为和热传递.
研究的目的:
- 研究表面粗度形状和数量的对纳米流体流动和热传递的影响.
- 在纳米通道中分析流体速度,温度和密度分布.
- 确定最佳的粗度,以增强热传输.
主要方法:
- 采用了分子动力学理论和LAMMPS模拟.
- 模拟的纳米通道具有铜壁和液.
- 实施的矩形,半球和三角形表面粗度.
主要成果:
- 与矩形相比,三角形粗度增加了6%的流体温度和25%的速度.
- 增加的粗度数量使流体温度降低了12%,速度降低了38%.
- 粗性增强了局部流体速度,并减少了墙壁附近的密度波动.
结论:
- 表面粗的形状和数量极大地影响了纳米流体的流动和热传递.
- 与半球和矩形相比,三角形粗性提供了优越的流体速度和温度.
- 进一步研究表面地形学对纳米流体的影响是有必要的.
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