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研究两个拉伸盘结构变化的影响MHD模型的动态
Ali Ahmadi Azar1, Bahram Jalili1, Payam Jalili2
1Department of Mechanical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran.
Scientific reports
|December 9, 2023
概括
在拉伸盘之间导电微极流体流动的结构变化显著影响流体的行为. 增加磁盘拉伸会大幅提高温度和努塞尔特数,而更大的磁盘分离会减少微旋转和墙壁应力.
科学领域:
- 流体动力学 流体动力学
- 磁性水电动力学 (MHD) 是一个学科.
- 非牛顿流体理论的理论.
背景情况:
- 在磁场下的电导微极流体研究对于MHD发电机和滑系统等应用至关重要.
- 以前的研究往往集中在对单个无维参数的数学分析上,缺乏对结构变化的实际见解.
- 了解结构变化 (磁盘距离,拉伸率) 对流体性能的相互作用,对于优化工程设计至关重要.
研究的目的:
- 理论上研究在一个均的垂直磁场下的两个拉伸盘之间的电导微极流体的行为.
- 分析结构变化,特别是磁盘距离和拉伸速度对流体流量,热量和度转移的影响.
- 重新定义关键的无维参数,以更好地反映对结构变化的物理依赖.
主要方法:
- 管理的非线性合局部微分方程通过相似性转换被转换为普通微分方程.
- 一种半分析的混合分析和数值方法 (HAN-方法) 用于解决转换方程.
- 确定了9个无维参数,包括拉伸雷诺斯数,磁性参数和微极参数.
主要成果:
- 发现结构变化会影响辐射速度,轴速度,微旋转,温度和度.
- 磁盘的拉伸速度增加导致温度和努塞尔特数的显著上升.
- 磁盘之间的距离增加导致微旋转和壁对应应力大幅减少.
结论:
- 这项研究为分析依赖于微极流体流动结构变化的物理参数提供了一种新的方法.
- 结果强调了磁盘拉伸率和分离距离在控制热量和流量特性的关键作用.
- 与以前的研究进行验证证实了在特定情况下获得的结果的准确性.
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