由于混合纳米流体流中的多个局部磁场产生了 - - 一个数值调查
Shabbir Ahmad1,2, Kashif Ali2, Nek Muhammad Katbar3,4
1Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, 430074, China.
Heliyon
|July 14, 2023
概括
这项研究研究了由洛伦茨力驱动的混合纳米流体中的 vortex 模式. 结果显示,磁场影响热传递和摩擦,而纳米粒子提高了性能.
科学领域:
- 流体动力学 流体动力学
- 纳米技术纳米技术
- 磁动力学 磁动力学
背景情况:
- 旋对于理解流体混合和质量传输至关重要.
- 它们的研究对于分析风和龙卷风等自然现象至关重要.
- 洛伦兹力可以诱导流体的复杂流动行为.
研究的目的:
- 在洛伦茨力下的Fe3O4-Cu纳米粒子混合纳米流体中探索状模式的形成.
- 为了数值地解决混合纳米流体动力学的控制部分微分方程 (PDEs).
- 分析磁带和雷诺兹数对流量和热特性的影响.
主要方法:
- 模拟混合纳米流体作为单相流体.
- 统治部分微分方程 (PDEs) 的数值解.
- 在磁带周围的流线和异热线的可视化.
主要成果:
- 磁带上的洛伦茨力诱导纳米粒子旋转和复杂的结构.
- 磁场减少了34%的努塞尔特数,并增加了9%的皮肤摩擦.
- 雷诺兹数放大了局部磁场对流动力学的影响.
结论:
- 混合纳米流体与Fe3O4-Cu纳米颗粒在洛伦茨力下表现出复杂的旋动态.
- 磁场显著改变热传递和皮肤摩擦.
- 纳米粒子增强Nusselt数,对皮肤摩擦有很小的影响.
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