Abstract Erosion wear is an inevitable problem in particle-laden flows. Generally, the erosive wear is reported as a thickness loss (mm or mm/yr), but in the form of a scar or wear map distribution on the target material surface. Recent advances in CFD techniques now allow the prediction of a time-dependent surface evolution due to the impact of solid particles. With this in mind, an erosion-coupled dynamic mesh approach was employed to predict a realistic surface deformation in a standard 90∘ elbow. Experimental data were used to validate the numerical results. The effects of wall condition, namely, smooth wall, rough wall, and rough wall with particle rotation, on the topology of the deformed surface were investigated. Interestingly, the simulations revealed better performance of the dynamic mesh approach when compared to static mesh cases. Also, it was found that wall roughness and particle rotation significantly influences the shape and magnitude of the surface deformation. The results also showed that particle dynamics in response to the surface deformation might be the key to solve complex erosion-related problems. In such cases, the erosion spots can evolve over time and may be inaccurately assessed when based solely on static mesh erosion calculations.

中文翻译：

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使用侵蚀耦合动态网格预测标准 90° 弯头的厚度损失

摘要 冲刷磨损是颗粒流中不可避免的问题。通常，侵蚀磨损报告为厚度损失（mm 或 mm/yr），但以目标材料表面上的疤痕或磨损图分布的形式报告。CFD 技术的最新进展现在允许预测由于固体颗粒的影响而导致的与时间相关的表面演变。考虑到这一点，采用侵蚀耦合动态网格方法来预测标准 90∘ 弯头中的真实表面变形。实验数据用于验证数值结果。研究了壁面条件，即光滑壁面、粗糙壁面和带粒子旋转的粗糙壁面对变形表面拓扑结构的影响。有趣的是，与静态网格情况相比，模拟显示动态网格方法的性能更好。还，结果表明，壁面粗糙度和粒子旋转显着影响表面变形的形状和大小。结果还表明，响应于表面变形的粒子动力学可能是解决复杂的侵蚀相关问题的关键。在这种情况下，侵蚀点会随着时间的推移而演变，并且在仅基于静态网格侵蚀计算时可能会被不准确地评估。