Experimental investigation and modeling of local mass transfer rates in pure and contaminated Taylor flows

纯泰勒流和污染泰勒流中局部传质速率的实验研究和建模

• 批准号: 167159060
• 负责人: Professor Dr.-Ing. Michael Schlüter
• 金额: --
• 依托单位: Institut für Mehrphasenströmungen V-5
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167159060?language=en
• 关键词: Experimental; investigation; modeling; local; mass

In nature and most applications for Chemical, Biochemical, Medical and Environmental Engineering, the transport of molecules from one phase into another phase (gas/liquid or liquid/liquid) plays a dominant role to achieve high yields and purities. To use these transport processes at fluidic interfaces as efficient as possible a deep understanding of local phenomena is indispensable. These will be studied under well defined conditions in a Taylor flow, in circular and square capillaries with a diameter of 1 mm. Therefore local velocity fields will be measured by Micro-Particle Image Velocimetry and local concentration fields by Confocal Laser Scanning Microscopy with a spatial resolution of 5 μm. The mass transfer in the liquid film will be measured by a Confocal Two-Photon Fluorescence Technique with a spatial resolution of 1 μm. For mass transfer an oxygen/nitrogen pure water system will be used with a Ruthenium-complex as fluorescent dye. The impact of ionic and anionic surfactants on the shape and local mass transfer performance of fluidic interfaces will be investigated and modelled. With measurement techniques at the front edge of spatial resolution and the mathematical excellence of this priority program, new insights into local mass transfer processes at fluidic interfaces will be possible.

在自然界和化学、生物化学、医学和环境工程的大多数应用中，分子从一个相到另一个相（气/液或液/液）的传输对于实现高产率和纯度起着主导作用。为了尽可能有效地在流体界面处使用这些传输过程，对局部现象的深入理解是必不可少的。这些将在泰勒流中，在直径为1 mm的圆形和方形毛细管中，在明确定义的条件下进行研究。因此，将通过微粒子图像测速法测量局部速度场，并通过空间分辨率为5 μm的共聚焦激光扫描显微镜测量局部浓度场。液膜中的传质将通过空间分辨率为1 μm的共焦双光子荧光技术来测量。对于传质，将使用氧/氮纯水系统，钌络合物作为荧光染料。离子和阴离子表面活性剂对流体界面的形状和局部传质性能的影响将被研究和建模。随着空间分辨率前沿的测量技术和该优先计划的数学卓越性，将有可能对流体界面的局部传质过程产生新的见解。