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

该研究启动奖将启动一项实验计划的开发，以便对复杂粘弹性流中的完整二维运动学场进行定量评估。一种基于视频的粒子跟踪技术被称为数字粒子图像测速，该技术采用高分辨率单色CCD相机和快速数字信号处理算法，以消除与传统粒子成像方法相关的耗时的摄影和光力学步骤。​该装置将用于通过典型工业过程特征的模型几何来详细研究高粘弹性材料在缓慢流动过程中产生的流动不稳定性。

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.