在多孔介质流中对无网状纳维埃-斯托克斯溶剂进行交叉验证
Dawid Strzelczyk1,2, Miha Rot3,4, Gregor Kosec3
1Faculty of Physics and Astronomy, University of Wrocław, pl. Maxa Borna 9, 50-204, Wrocław, Poland. dawid.strzelczyk@uwr.edu.pl.
Scientific reports
|October 1, 2025
概括
这项研究比较了两种无网状计算流体动力学 (CFD) 溶解器,用于多孔介质中的流体流. 这些方法准确地预测了各种孔隙的阻力和透性,扩展了现有的文献数据.
科学领域:
- 计算流体动力学 (CFD) 是一种计算流体动力学.
- 多孔的流媒体流动的媒介.
- 数字方法 数字方法.
背景情况:
- 了解通过多孔介质流动的流体在各种科学和工程领域至关重要.
- 准确模拟孔尺度流动需要先进的数值技术,能够处理复杂的几何形状.
研究的目的:
- 为了评估和比较两个无网格计算流体动力学 (CFD) 解决方案,用于模拟孔尺度流体流动.
- 使用这些溶剂,研究孔径对流体流动特性的影响.
- 扩大对孔介质中的流体流动行为的理解,超出此前报告的孔度范围.
主要方法:
- 实施了两种无网格的CFD溶解器:带有两个放松时间的格子博尔茨曼法 (LBM) 和在人工可压缩性下直接的纳维埃-斯托克斯 (NS) 溶解器.
- 使用h-精制的无网格空间分离和辐射基函数 (RBF) 来进行场景近似.
- 创建有规律排列的可变半径球形粒的多孔介质模型,以控制多孔性.
主要成果:
- 在将阻力系数和透性结果与不同孔径的现有文献数据进行比较时,达成了很好的协议.
- 模拟成功地扩展到以前未报告的更高孔隙范围,证明了开发的解决方案的能力.
- 收和时间分析证实了无网状CFD解决者的效率和可靠性.
结论:
- 评估的无网状CFD溶解器,LBM和直接NS,对于在有孔的介质中进行孔尺度流体流动模拟,具有稳定性和准确性.
- 该研究提供了宝贵的数据流体流动行为在多孔介质在一个扩展范围的多孔性.
- 与RBF近似的无网格方法为复杂的流体动力学问题提供了灵活和有效的框架.
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