Experimental and numerical investigations of multiphase jets

多相射流的实验和数值研究

• 批准号: RGPIN-2014-05704
• 负责人: Azimi, AmirHossein
• 金额: $ 1.75万
• 依托单位: Lakehead University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=708293
• 关键词: Experimental; numerical; investigations; multiphase; jets

Sediment-laden and bubbly jets can be found in many engineering applications. Air injection into ambient water (i.e., bubbly jets) has been commonly used to enhance mixing and aeration in lakes and rivers, wastewater treatment, heat exchanger and industrial reactors. Sand-laden jets (i.e., slurry jets) can be found in mining operations, hydro-transport, dredging material disposal, and discharge of industrial and domestic wastewater. Understanding the dynamic interactions of air bubbles or sand particles with the ambient water are important for proper design and optimizing the engineering systems including oxygen diffusers and ocean outfalls. Extensive experimental investigations on bubbly jets have been carried out to measure the variations of bubble parameters such as bubble size, specific interfacial area, bubble velocity and ambient water structure. Early investigations of bubbly jets have shown that the mixing performance of bubbly jets is greatly influenced by the bubble size. Slurry jets have also many industrial and engineering applications, such as, slurry transport, marine bed capping, mining operations, dredging material disposal, and discharge of industrial and domestic wastewater. Understanding the dynamic interactions of the sediment particles and its ambient are important for proper design and optimizing those engineering systems. Depending upon the flow configurations, sediments can be transported through pipelines/channels or can be passed through a nozzle to form a slurry jet. Dynamic interactions of the sand particles and its ambient are also correlated with the physical characteristics of sediments such as sediment size, shape, density and concentration. This program attempts to understand the underlying mechanisms between different phases (i.e., solid, liquid and gas phases) and tries to enhance the existing knowledge in this field. Both experimental and numerical approaches are going to be used to study the problem. Highly qualified personnel will be trained to pursue research in this area and monitor the existing systems in both nature and industry. Numerical modeling can be a suitable choice to study the dynamics of sediment-laden and bubbly jets. Commercial modeling packages or research-based open source models can be used in this program. Many scenarios can be simulated using a validated model to study other flow configurations for designing and optimization purposes. Sub-routines can be developed for research-based codes to enhance the capability of models for more accurate simulations in this field.

在许多工程应用中可以找到充满沉积物和起泡的喷气式飞机。在环境水中注入空气（即起泡的喷气机）通常用于增强湖泊和河流，废水处理，热交换器和工业反应堆的混合和充气。可以在采矿作业，水力发电，疏pressport的材料处置以及工业和国内废水的排放中找到装有沙子的喷气机（即浆液喷气机）。了解气泡或沙子颗粒与环境水的动态相互作用对于正确设计和优化工程系统至关重要，包括氧气扩散器和海洋排放。 已经对气泡喷射的广泛的实验研究进行了测量，以测量气泡参数的变化，例如气泡大小，特定的界面面积，气泡速度和环境水结构。对起泡喷气机的早期调查表明，起泡喷气机的混合性能受气泡尺寸的极大影响。浆料喷气机还具有许多工业和工程应用，例如泥浆运输，海上床盖，采矿作业，疏parting材料处置以及工业和家庭废水的排放。了解沉积物颗粒及其环境的动态相互作用对于正确设计和优化这些工程系统至关重要。根据流量配置，可以通过管道/通道运输沉积物，也可以通过喷嘴传递以形成浆料射流。沙子及其环境的动态相互作用也与沉积物的物理特性（例如沉积物尺寸，形状，密度和浓度）相关。 该计划试图了解不同阶段（即固体，液体和气相）之间的潜在机制，并试图增强该领域的现有知识。实验和数值方法都将用于研究问题。高素质的人员将接受培训，可以在这一领域进行研究，并监视自然和工业的现有系统。数值建模可以是研究富含沉积物和起泡喷气机的动力学的合适选择。该程序可以使用商业建模软件包或基于研究的开源模型。可以使用经过验证的模型来模拟许多方案，以研究用于设计和优化目的的其他流程配置。可以为基于研究的代码开发子程序，以增强模型在该领域中更准确的模拟能力。