工艺与制造英文2024被引 2
多孔壁通道中颗粒载流的不稳定性研究
On the instability of particle-laden flows in channels with porous walls
Parisa Mirbod, Saman Hooshyar, Ehsan Taheri, Harunori Yoshikawa · University of Illinois Chicago
摘要整理
本研究调查了低颗粒体积分数流体在多孔壁通道中的稳定性。中性浮力颗粒通过Stokes阻力与载流体相互作用。研究探讨了颗粒松弛时间和质量分数对流动稳定性的影响，采用孔隙率固定为0.6、渗透率不同的多孔壁。结果表明：在高渗透性多孔壁中，流动稳定性主要由多孔结构决定，颗粒体积分数和松弛时间分别产生相对较小的失稳和稳定效应；随着多孔壁渗透率降低，流动对颗粒体积分数的敏感性增加，此时较高的颗粒体积分数和较长的松弛时间有利于流动稳定；颗粒和多孔壁可有效控制流动，维持层流或诱发湍流转变。研究还分析了多孔表面动量传递系数τ对流动稳定性的影响，并对常用多孔材料的临界稳定曲线进行了对比分析。研究结果表明颗粒-多孔壁耦合系统在流动控制中具有重要应用潜力。
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