Numerical modelling of three-phase cavitation flows through venturi

通过文丘里管的三相空化流的数值模拟

• 批准号: 528337-2018
• 负责人: Nikrityuk, Petr
• 金额: $ 1.82万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=660973
• 关键词: Numerical; modelling; three; phase; cavitation

Eriez Flotation Division (EFD), which is a wholly owned subsidiary of Eriez Manufacturing Co, provides**advanced testing and engineering services in addition to sparging and column flotation equipment for the**mining and minerals processing industries. EFD engineers have designed a new venturi - CavTube®, which is**used to produce ultra-fine bubbles and intense contacting of particles and bubbles for a flotation of**hydrophobic minerals. The pressure drop across the CavTube® is critical for operating sparging and column**flotation equipment, e.g. pressure drop determines the required pump duty (e.g., energy input). In this view, an**accurate prediction of the pressure drop for different inflow conditions: slurry composition and air injection**rate is needed for the optimal design of operating parameters for CavTube®. In this work, the so-called**three-phase Euler-Euler-Euler-based model available in Ansys-Fluent CFD software will be adapted to**simulate cavitation phenomena in venturi. Using the results of 2D and 3D CFD simulations we develop and**validate a simplified semi-empirical model which will be used to predict pressure drop in a venturi in**dependence on inflow parameters such as the location of air injection, volume fraction of solid phase and**venturi geometry. Based on 2D and 3D CFD-based multi-phase simulations A new advance semi-empirical**model will be developed to estimate the operating pressure drop for different air injection scenarios. The**outcome of this project will be development and validation of an advance semi-empirical model to predict**pressure drop in dependence on flow rate, a composition of slurry and air injection rate. The expected outcome**from the modeling the cavitation in multi-phase flows inside venturis will significantly contribute to decision**making on effective implementation of new engineered venturis in different mineral processing technologies**across Canada.

Eriez浮选部（EFD）是Eriez制造公司的全资子公司，为采矿和矿物加工行业提供先进的测试和工程服务，以及喷射和柱式浮选设备。EFD工程师设计了一种新的文丘里管- CavTube®，它**用于产生超细气泡和颗粒和气泡的强烈接触，用于浮选**疏水矿物。横跨CavTube®的压降对于操作喷射和柱式浮选设备至关重要，例如压降决定了所需的泵工作（例如，能量输入）。从这个角度来看，需要准确预测不同流入条件下的压降：浆液成分和空气注入速度，以优化设计CavTube®的操作参数。在这项工作中，将采用Ansys-Fluent CFD软件中所谓的基于欧拉-欧拉-欧拉的三相欧拉模型来模拟文丘里腔中的空化现象。利用二维和三维CFD模拟的结果，我们开发并验证了一个简化的半经验模型，该模型将用于预测文丘里管中的压降，该压降取决于流入参数，如空气注入位置、固相体积分数和文丘里管的几何形状。基于二维和三维cfd的多相模拟，将建立一个新的先进的半经验模型来估计不同空气喷射场景下的操作压降。该项目的成果将是开发和验证一种先进的半经验模型，以预测压降与流量、泥浆成分和空气注入速度的关系。对venturis内部多相流中的空化现象进行建模的预期结果将极大地有助于在加拿大各地的不同矿物加工技术中有效实施新型工程venturis的决策**。