Abstract Cavitating Venturi tubes play a significant role in mineral processing and their performance depends to a great extent on the presence of solid particles. This work is devoted to experimental and numerical studies of cavitation phenomena in a Venturi tube with different solid mass concentrations (Ws = 5–30 wt%). Numerical simulation is carried out with an axisymmetric 2D CFD-based model available in the commercial CFD software ANSYS FLUENT 16.2. The simulation is conducted using the Eulerian-Eulerian approach. A new four-phase global model was developed based on a simpler engineering approach and validated against experimental data. Predictions of the pressure drop obtained from the CFD model are generally in good conformance with experimental measurements. Both the numerical and experimental studies reveal that the addition of solid particles in the cavitating Venturi tube has significant effects on the generation of cavitation. The outcomes show that the higher solid mass concentration is of benefit to cavitation intensity. The proposed CFD model has proved to be an efficient and reliable tool in predicting the cavitation activities and performance characteristics of the cavitating Venturi tube.

中文翻译：

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文丘里管中空化颗粒流的实验和数值研究

摘要 空化文丘里管在矿物加工中发挥着重要作用，其性能在很大程度上取决于固体颗粒的存在。这项工作致力于对具有不同固体质量浓度 (Ws = 5–30 wt%) 的文丘里管中的空化现象进行实验和数值研究。使用商用 CFD 软件 ANSYS FLUENT 16.2 中提供的基于轴对称 2D CFD 的模型进行数值模拟。使用欧拉-欧拉方法进行模拟。基于更简单的工程方法开发了一个新的四阶段全局模型，并根据实验数据进行了验证。从 CFD 模型获得的压降预测通常与实验测量结果一致。数值和实验研究都表明，在空化文丘里管中加入固体颗粒对空化的产生有显着影响。结果表明，较高的固体质量浓度有利于空化强度。所提出的 CFD 模型已被证明是一种有效且可靠的工具，可用于预测空化文丘里管的空化活动和性能特征。