在辐射拉伸表面上对磁银-石墨烯混合纳米流体的朱尔加热和散射对效应
M Ragavi1, P Sreenivasulu2, T Poornima1
1Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632014, India.
Heliyon
|February 11, 2025
概括
本研究从数值上探讨了不稳定的混合纳米流体流 (Ag-Gr/H2O) 进行更好的传热. 增强的Eckert和Biot数改善了热分布,而磁性和多孔性效应减少了流量.
科学领域:
- 流体动力学 流体动力学
- 热传递是一种热传递.
- 纳米技术纳米技术
背景情况:
- 工业应用需要增强的传热机制.
- 混合纳米流体比传统流体提供了更好的热性能.
- 了解流动动力学和热行为对于优化至关重要.
研究的目的:
- 为了数值地研究混合纳米流体 (Ag-Gr/H2O) 在辐射表面上的不稳定的轴对称流动.
- 分析对流传热传递,吸入/注入,朱尔加热和粘性散热的影响.
- 检查磁场强度,孔隙性和纳米颗粒度对流体流量和热谱的影响.
主要方法:
- 用相似性转换将部分微分方程 (PDEs) 转换为普通微分方程 (ODEs).
- 在 MATLAB.中实现的使用有限差异方法 (Keller Box 技术) 的数值解决方案.
- 参数的系统变化包括磁强度,不稳定性,埃克尔特数,生物数,吸入/注入,多孔性和纳米粒子体积分数.
主要成果:
- 随着埃克尔特和比奥特数的增加,观察到热分布的显著改善.
- 发现流量分布随着磁性和多孔性参数的增加而减少.
- 对于各种嵌入式参数,量化了局部Nusselt数和皮肤摩擦系数的变化.
结论:
- 数字方法是稳健可靠的,通过与先前研究的良好一致性来验证.
- 混合纳米流体显示出增强热传递应用的潜力.
- 通过调整关键物理参数,可以控制流体流量和热性能.
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