Investigations on zeolite-based ER fluids supported by experimental design

被引:17
作者
Böse, H [1 ]
机构
[1] Fraunhofer Inst Silicatforsch, D-97082 Wurzburg, Germany
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1999年 / 13卷 / 14-16期
关键词
D O I
10.1142/S0217979299001910
中图分类号
O59 [应用物理学];
学科分类号
摘要
The application of experimental design for determining the influence of various parameters on rheological properties of electrorheological (ER) fluids is demonstrated. Such statistical methods allow the quantitative determination of parameter effects even in the presence of considerable property fluctuations of the ER fluid as well as the calculation of interactions between the parameter effects. They thus provide a powerful optimization tool. Investigations have been performed on ER fluids containing particles of zeolite A in silicone oil, The influence of zeolite content oil viscosity, particle size, cation composition and ER fluid temperature on the viscosity of ER fluids with and without electric field has been studied. In addition to the main effects of the parameters interactions between them also play a considerable: role. The ratio of ER fluid viscosities with and without field, respectively, decreases with rising oil viscosity and increases with temperature. The:larger value of the ratio for ER fluids: with, smaller particles is referred to different particle structures. Results of parameter effects on viscosity of the ER fluid in electric fields depend on the shear rate. Cation exchange of sodium to potassium has only a minor influence on ER activity. This result is compared with cation exchange with calcium, by which ER activity is drastically diminished. The loss of activity can be related to the occupation of different cation sites in zeolite A.
引用
收藏
页码:1878 / 1885
页数:8
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