We report measurements performed to understand the effects of gas (QG) and liquid (QL) flow rates, surface tension (σGL), liquid viscosity (μL), and particle diameter (dp) on dynamics of local liquid spreading, pressure drop, and overall liquid holdup in a pseudo‐2D trickle bed. We show that an increase in the gas‐phase inertia leads to a decrease in the lateral liquid spreading, whereas an increase in the liquid‐phase inertia leads to an increase in the lateral liquid spreading. We also show that an increase in dp causes a reduction in the lateral liquid spreading. Using dimensionless numbers (AB and We), we propose a regime map showing contributions of different forces to the local liquid spreading. We show that the interplay between the inertia and capillary forces governs the liquid distribution near the inlet, whereas the relative contribution of gravitational force increases toward the outlet. Finally, we propose a relation between AB and We for “bed‐scale” liquid spreading.

中文翻译：

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滴流床中床级液体扩散动力学的实验表征


我们报告了为了解气体影响而进行的测量（问G ）和液体（问L ) 流速、表面张力 ( σ GL ）、液体粘度（ μ L ）和粒径（ d p ）研究伪二维滴流床中局部液体扩散、压降和整体持液率的动力学。我们发现，气相惯性的增加导致横向液体扩散的减少，而液相惯性的增加导致横向液体扩散的增加​​。我们还表明，增加d p导致横向液体扩散的减少。使用无量纲数（AB 和 We），我们提出了一个状态图，显示不同力对局部液体扩散的贡献。我们表明，惯性和毛细管力之间的相互作用控制着入口附近的液体分布，而重力的相对贡献朝着出口增加。最后，我们提出了“床级”液体扩散的 AB 和 We 之间的关系。