Erosion has been recognized as one of the major threats for industries involving multiphase transportation pipelines. Within the last decades, effective parameters on wear pattern have been identified. As a result, the (famous) V-shaped erosion profile has been detected for the pipes' elbow section. In this study, CFD is employed to investigate the erosion mechanism on the square duct elbows. A novel erosion pattern has been observed for square ducts in comparison with the pipes. The impact of several parameters (particle and flow velocity, secondary flow, turbulent intensity, particle streamline) has been inspected as well. It has been led to the conclusion that the erosion rate of square ducts is lower than common pipes, especially when either higher flow velocities or bigger particles size are employed.

侵蚀已被认为是涉及多相运输管道行业的主要威胁之一。在过去的几十年中，已经确定了磨损模式的有效参数。结果，已检测到管道肘部的（著名的）V形腐蚀轮廓。在这项研究中，CFD用于研究方管肘部的腐蚀机理。与管道相比，方形管道出现了新的腐蚀形式。还检查了几个参数（颗粒和流速，二次流，湍流强度，颗粒流线）的影响。得出的结论是，方形管道的腐蚀速率低于普通管道，特别是当采用较高的流速或较大的颗粒尺寸时。