New insights into flows in stirred vessels with advanced laser diagnostics

搅拌容器中的混合是许多工程操作中的关键单元操作，先正达对此特别感兴趣，而且涉及许多行业，并推动了许多旨在了解一系列现象的研究，以此作为优化相关过程的途径[1-3]。了解这些过程中的关键传输现象依赖于适当缩小的混合实验，而良好的缩小又需要适当尺寸的容器以及选择的流体和操作条件。对这些现象的测量可以使用不同的方法。企业实验室专注于测量的稳健性、速度、可靠性、成本和安全性，而大学的最佳实践关注的是能够以目前行业无法达到的详细程度检查此类流动的新方法，从而提供新的信息和大大提高的理解水平。本项目的总体目标是将先进的测量技术应用于选定的感兴趣的流，并使用产生的数据来解释和评论当前的行业知识和实践。如前所述，有趣的是搅拌容器中存在界面(气泡或液滴)和热/质传递的流动。

Mixing in stirred vessels is a key unit operation in many engineering operations, and is of particular interest to Syngenta, but also across numerous industries, and has motivated many studies aimed at understanding a range of phenomena as a pathway for optimising relevant processes [1-3]. Understanding the key transport phenomena in these processes relies on appropriately scaled-down mixing experiments, and excellence in scale down, in turn, requires properly sized vessels and selected fluids and operating conditions.Measurements of such phenomena can be performed using different approaches. Corporate laboratories focus on measurement robustness, speed, reliability, cost and safety, while university best-practice is concerned with novel methods that can inspect such flows at a level of detail that is currently unattainable in industry, thus providing new information and a much-improved level of understanding. The overall aim of this present project is to apply advanced measurement techniques to a selected flow of interest, and to use the resulting data to interpret and comment on current industrial knowledge and practice. Of interest, as noted earlier, are flows in stirred vessels in the present of interfaces (bubbles or droplets) and heat/mass transfer