Abstract

Turbulent particle flow is modeled using CFD to predict the erosion rate in the pipe. Anisotropic turbulence of the Reynolds Stress Model (RSM) is used in modeling turbulent fluid (natural gas) and particle (sand) flow through the Eulerian-Lagrangian equations. Since RSM can simulate the effects of anisotropy and flow history, it can better predict the behavior of particles that are dependent on the fluid flow. Also, the particle path line and their effect on erosion have been investigated at the all erosion models studied in this study. The results show that using RSM with the Tabakoff erosion model can predict maximum erosion with an error of less than 5% in the range of 47–49 degrees of elbow bend. However, other turbulence models, such as k-epsilon, are capable of delivering results with an error of more than 50% in the range of 45–49 degrees of elbow bend. Further, RSM can well simulate secondary flows, such as near-wall recirculation and dean flow.

摘要

使用 CFD 对湍流粒子流进行建模，以预测管道中的侵蚀率。雷诺应力模型 (RSM) 的各向异性湍流用于对通过欧拉-拉格朗日方程的湍流流体（天然气）和颗粒（沙）流进行建模。由于 RSM 可以模拟各向异性和流动历史的影响，因此可以更好地预测依赖于流体流动的粒子的行为。此外，在本研究中研究的所有侵蚀模型中都研究了粒子路径线及其对侵蚀的影响。结果表明，将 RSM 与 Tabakoff 侵蚀模型结合使用，可以在肘部弯曲 47-49 度范围内以小于 5% 的误差预测最大侵蚀。然而，其他湍流模型，例如 k-epsilon，能够在肘部弯曲 45-49 度范围内提供误差超过 50% 的结果。此外，RSM 可以很好地模拟二次流，例如近壁再循环和迪恩流。