Replacement of the new wave research solo PIV Nd:YAG laser

将水、废水和工业废水排放到诸如河流的开放通道中已经是一种常见的做法。 模拟这些流动系统和相关运输的能力对于理解此类排放的环境影响至关重要。 在工业过程中，喷雾技术具有广泛的应用和提高效率的努力（例如，在燃料喷雾的情况下的燃烧或在农用化学品或油漆喷雾的情况下的漂移的减少）将导致经济和环境效益。 在大多数情况下，流动是湍流的，这意味着混合主要是由于流体的小尺度混沌行为。 为了更好地理解和控制上述流动/过程，速度场和颗粒尺寸的知识是必不可少的成分。 温莎大学正在利用基于激光的非侵入式仪器，如粒子图像测速仪（PIV）进行这方面的研究。 此外，PIV在颗粒尺寸表征和通过光诱导荧光的流动可视化方面非常有帮助。在直接应用中，最近在大学开发了一种创新的物理化学过程，用于处理合并的下水道溢流。 拟议的设备补助金是为了支持更换粒子图像测速系统中出现故障的激光器，以便使该系统能够运行。 此外，正在寻求更高功率的激光器（120 mJ/脉冲）来取代50 mJ/脉冲激光器。 这将：（i）提高所获取的速度数据的质量，（ii）能够在喷雾研究中测量较小的颗粒尺寸，以及（iii）使用平面光诱导荧光增强流动可视化。 由于两个系的五名学生需要升级系统，因此迫切需要进行升级。 在不久的将来，该设备将用于以下项目：明渠水流中粗糙度的影响（2名博士生，申请人的发现补助金），处理系统中的混合（1名MASc学生）和摄入量研究（1名MASc学生）。 进行喷雾研究的能力（1名博士后）将提高我们从温莎汽车行业获得额外资金的能力。

It has been a common practice to discharge water, wastewater and industrial effluents into open channels such as rivers.  The ability to model these flow systems and the associated transport is of critical importance in understanding the environmental impact of such discharges.  Amongst industrial processes, spray technology has a wide range of applications and efforts to increase efficiency (for e.g., combustion in the case of fuel sprays or reduction in drift in the case of agrochemicals or paint sprays) will lead to economic & environmental benefits.  In most cases, the flows are turbulent, which means the mixing is largely due to small-scale chaotic behaviour of the fluid.  To better understand and control the above mentioned flows/processes, knowledge of the velocity field and particle size is an essential ingredient.  Research in this area is in progress at the University of Windsor using laser based non-intrusive instrumentaion such as the Particle Image Velocimetry (PIV).  In addition, PIV can be very helpful in particle size characterization, and flow visualization by means of light induced fluorescence. Amongst immediate applications, an innovative physio-chemical process has been recently developed at the University for the treatment of combined sewer overflow.     The proposed equipment grant is requested to support the replacement of the failed laser in the PIV system in order to make the system operable.  Further a higher power laser (120 mJ/pulse) is being sought to replace the 50 mJ/pulse laser.  This will: (i) enhance the quality of the velocity data being acquired, (ii) be able to measure smaller particle size in spray studies and (iii) enhance flow visualization using planar light induced fluorescence.  There is an immediate need for this upgrading as five students from two departments need the upgraded system.  In the immediate future, the equipment will be used in the following projects: effect of roughness in open channel flows, (2 PhD students, applicant's Discovery grant), mixing in treatment systems (1 MASc student) and intake studies (1 MASc student).  The capability to conduct spray studies (1 post-doc) will enhance our capability to procure additional funding from the automotive industry in Windsor.