Dye-Streak Visualization of Turbulent Flows: Multiphase and Fluid Mechanics Aspects

摘要CTS-9508409 JW霍伊特 传统的染料条纹可视化技术的扩展，通过使用“连续”串组成的剪切增稠和减阻成分将进行研究。 所提出的可视化方法在各种流动中的应用，以前的方法有局限性，如非定常流，多相流，大的流域可视化，湍流扩散和混合。 该方法将针对典型的流量情况进行校准。 然后，将研究各种相干湍流结构和流动宏观结构，例如多圆柱流动，临界雷诺数附近的单个圆柱绕流，以及湍流边界层中的流动结构。 该项目将在布里斯托大学的合作和帮助下完成，那里有合适的实验设施可供私人研究员使用。 新方法的一个特殊的应用领域是在复杂的流动中，其中的条纹线是可视化的。 所提出的方法提供了一种替代更复杂和昂贵的技术，并具有独特的功能，可以在各种情况下利用。 ***

ABSTRACT CTS-9508409 J. W. Hoyt The extension of the traditional dye streak visualization technique by using a "continous" string composed of shear thickening and drag reducing constituents will be investigated. The proposed visualization method has applications in various flows where previous methods have limitations, such as unsteady flows, multiphase flow, large flow domain visualizations, turbulent diffusion and mixing. The method will be calibrated for typical flow situations. Then, various coherent turbulent structures and flow macrostructures will be investigated, such as flow through multiple cylinders, flow around a single cylinder near critical Reynolds number, and flow structures in turbulent boundary layer. The project will be completed in collaboration and with the help of the University of Bristol, where suitable experimental facilities are available to the P. I. A special niche of application of the new method is in the complex flows where the streaklines have to be visualized. The proposed method provides an alternative to much more sophisticated and expensive techniques, and has unique features which can be exploited in various situations. ***