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调查斜坡双层均多孔流体方形腔体中的双扩散自然对流
Bahram Jalili1, Majdeddin Emad1, Emad Hasani Malekshah2
1Department of Mechanical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran.
Scientific reports
|March 27, 2024
概括
这项研究以数值方式检查了双层外中的双扩散自然对流. 诸如孔隙厚度和导热率比率之类的关键参数显著影响热传输,其结果通过有限元法得到验证.
科学领域:
- 流体动力学 流体动力学
- 热传递是一种热传递.
- 孔隙介质的对流对流是指孔隙介质的对流.
背景情况:
- 在垂直双层方形外中研究具有双扩散性质的自然对流.
- 体由一个多孔层和一个水性流体层组成,具有附加的,无透的水平墙壁.
研究的目的:
- 以数值研究孔隙厚度,孔腔旋转角度和导热比对双扩散对流的影响.
- 分析达西和雷利数对传热的影响,并在两个层的接口处获得努塞尔特数.
主要方法:
- 采用有限元法 (FEM) 来解决管理方程.
- 呈现结果作为温度场 (同热线) 和X和Y方向的速度行为.
主要成果:
- 随着多孔层厚度的增加,努塞尔特数下降到0.8,然后增加.
- 导热比率<1降低了努塞尔特数;比率1-10增加了它.
- 较高的空腔旋转角度减少了热传递;增加的雷利和达西数增强了努塞尔特数.
结论:
- FEM的结果与使用其他数值方法的先前研究一致.
- 证明了几何和流体特性对双扩散对流的显著影响.
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