期刊论文

Fan, J.-J.

中文

光电工程

1003-501X

2012

39

3

30-33

10.3969/j.issn.1003-501x.2012.03.006

湖北省自然科学基金资助项目（2007ABA086）；

本校为第一且通讯机构

利用激光散斑测量装置，观察悬浮在电流变液中的淀粉颗粒在外加直流电场下的运动情况，表明当激光穿过电流变液时可以形成散斑。利用激光散斑测速法(LSV)对不同外加电场强度和不同浓度的淀粉电流变液中颗粒的运动速度进行了测量，通过自编的互相关计算软件对散斑图像进行了分析，获得了淀粉颗粒沿电场方向和垂直于电场方向的运动速度。实验结果表明在同一电场作用下，淀粉颗粒运动速度随时间的变化呈现震荡递减的趋势；并且存在一个临界颗粒浓度和临界电场强度，当低于此临界值时，颗粒运动速度增加，反之则减小。 The velocities of particles in Electrorheological (ER) fluids were measure...

The velocities of particles in Electrorheological (ER) fluids were measured by laser speckle velocimetry. It was verified that laser speckles could be formed by illuminating laser beam on the starch ER fluids. The speckle patterns was recorded with high speed CCD camera, and the speckle patterns sequences with short time intervals was obtained by intercepting laser speckle video. Velocities parallel to the direction of electric field and that perpendicular to the direction of electric field were obtained by processing the two consecutive speckle patterns. The experimental results show that the...