X-ray PIV measurements of blood flows without tracer particles

被引：0
|
作者：
Guk Bae Kim
Sang Joon Lee
机构：
[1] Pohang University of Science and Technology,Department of Mechanical Engineering
来源：
Experiments in Fluids | 2006年 / 41卷
关键词：
Particle Image Velocimetry; Fringe Pattern; CdWO4; Particle Image Velocimetry Algorithm; Real Blood Flow;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We analyzed the non-Newtonian flow characteristics of blood moving in a circular tube flow using an X-ray PIV method and compared the experimental results with hemodynamic models. The X-ray PIV method was improved for measuring quantitative velocity fields of blood flows using a coherent synchrotron X-ray. Without using any contrast media, this method can visualize flow pattern of blood by enhancing the phase-contrast and interference characteristics of blood cells. The enhanced X-ray images were achieved by optimizing the sample-to-scintillator distance, the sample thickness, and hematocrit in detail. The quantitative velocity fields of blood flows inside opaque conduits were obtained by applying a two-frame PIV algorithm to the X-ray images of the blood flows. The measured velocity data show typical features of blood flow such as the yield stress and shear-thinning effects.
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页码：195 / 200
页数：5
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