High Speed Visulization of Multphase Mixing

多相混合的高速可视化

• 批准号: 358802-2008
• 负责人: Derksen, Jacobus
• 金额: $ 4.01万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366043
• 关键词: Speed; Visulization; Multphase; Mixing

This proposal is for a general purpose flow visualization setup which uses a laser sheet and fast CCD camera to record the break-up and coalescence of droplets, local concentration of particles in multi-modal particle distributions, and the turbulent mixing of a passive or reacting scalar. This is a very powerful tool which will significantly expand the experimental capabilities of two complementary research groups.  Prof. Derksen studies mixing in multiphase flows with an emphasis on computational methods, and in particular the lattice Boltzmann approach.  Prof. Kresta studies turbulent mixing problems, with an emphasis on experiments and simplified engineering models which lead to improvements in mixing equipment design.  Both professors are passionate about increasing our physical understanding of mixing at the mesoscales, particularly in multiphase systems.  The need for experiments in industrially oriented fluid mechanics research has increased over the last five years. At the same time, the quality of high speed flow visualization has evolved towards high resolution, quantitative data that provide a great deal of information. These video images can be collected relatively quickly and inexpensively, although the quantitative analysis of the data is more involved.  In Derksen's group, the visualization data will provide validation and guidance for computational approaches. These data are needed to develop models for specific phenomena that can not be directly computed, to validate computational approaches, and to bring out the essential physical phenomena when exploring complex processes.  In Kresta's group, image analysis techniques based on spatial statistics will be developed in parallel with research on specific mixing problems. It is anticipated that these methods will find application in combustion and multiphase flows as well as on problems specifically related to mixing.  High speed visualization is a powerful tool which will dramatically improve our ability to probe and understand these complex and industrially important multiphase flow phenomena.

该建议是一个通用的流动可视化设置，它使用激光片和快速CCD相机记录的破碎和聚结的液滴，多模态颗粒分布的颗粒的局部浓度，和被动或反应标量的湍流混合。这是一个非常强大的工具，它将大大扩展两个互补研究小组的实验能力。Derksen研究多相流中的混合，重点是计算方法，特别是格子玻尔兹曼方法。Kresta研究湍流混合问题，重点是实验和简化的工程模型，从而改进混合设备设计。两位教授都热衷于提高我们对中观混合的物理理解，特别是在多相系统中。工业流体力学研究中的实验需求在过去五年中有所增加。与此同时，高速流动显示的质量已经朝着提供大量信息的高分辨率、定量数据的方向发展。这些视频图像可以相对快速和廉价地收集，尽管数据的定量分析更为复杂。在Derksen的小组中，可视化数据将为计算方法提供验证和指导。这些数据用于开发无法直接计算的特定现象的模型，验证计算方法，以及在探索复杂过程时揭示基本物理现象。在Kresta的小组中，基于空间统计的图像分析技术将与特定混合问题的研究并行开发。预计这些方法将在燃烧和多相流以及与混合特别相关的问题上得到应用。高速可视化是一种强有力的工具，它将大大提高我们探测和理解这些复杂的和工业上重要的多相流现象的能力。