Research Initiation Award: Investigation of Viscoelastic Flow Instabilities by Digital Particle Image Velocimetry

这一研究启动奖将启动一项实验计划的开发，以实现对复杂粘弹性流动中的完整、二维运动场的定量评估。基于视频的粒子跟踪技术被称为数字粒子图像测速技术，它使用高分辨率单色CCD摄像机和快速数字信号处理算法来消除与传统粒子成像方法相关的耗时的摄影和光学机械步骤。该装置将用于详细研究在高粘弹性材料缓慢流动过程中形成的流动不稳定性，这些流动不稳定性通过典型工业过程的特征模型几何形状。

This Research Initiation Award will initiate development of an experimental program to enable quantitative evaluation of the full, two-dimensional kinematic fields within a complex viscoelastic flow. A video-based particle-tracking technique referred to as Digital Particle Image Velocimetry is used which employs high resolution monochrome CCD cameras and fast digital signal processing algorithms to eliminate the time-consuming photographic and optomechanical steps associated with conventional particle-imaging methodologies. The apparatus will be used in detailed studies of the flow instabilities that develop during the slow flow of highly viscoelastic materials through model geometries that are characteristic of typical industrial processes.