The formation and agglomeration of gas hydrates represent a critical issue in flow assurance. This research aims to evaluate the transport and impact of particles on the slug flow pattern. Experimental investigations were conducted using inert polyethylene particles, mimicking gas hydrates, with four different particle sizes (100 µm, 200 µm, 300 µm and 400 µm) and three volumetric concentrations (1 %, 2.5 % and 5 %) with air and water as working fluids. The measurements show a relationship between slug flow characteristics and particle attributes, showing a nonlinear behavior influenced by both particle size and concentration, potentially explained via turbulence modulation. The particle size relative to the turbulent eddy size can either promote or damp the turbulence intensity, with impact on the peak velocity of the flow, and consequences in the elongated bubble velocity. In the case of lower mixture velocities and higher liquid loadings, particles also influence the slug flow formation.

中文翻译：

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三相固液气流量测量中观察到的段塞流特性的调制


气体水合物的形成和聚集是流量保证中的一个关键问题。本研究旨在评估颗粒的传输和对段塞流模式的影响。使用模拟气体水合物的惰性聚乙烯颗粒进行实验研究，具有四种不同的粒径（100 µm、200 µm、300 µm 和 400 µm）和三种体积浓度（1%、2.5% 和 5%），空气和水为工作流体。测量结果显示了段塞流特性和颗粒属性之间的关系，显示出受颗粒尺寸和浓度影响的非线性行为，这可能可以通过湍流调制来解释。相对于湍流涡流尺寸的颗粒尺寸可以促进或减弱湍流强度，从而影响流动的峰值速度，并影响拉长的气泡速度。在较低的混合速度和较高的液体负载的情况下，颗粒也会影响段塞流的形成。