Dielectric Mechanism and Rheological Properties of Electro-Fluids
Dielectric Mechanism and Rheological Properties of Electro-Fluids
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DOI：
10.1143/jjap.11.319
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发表时间：
1972-03
影响因子：
1.5
通讯作者：
Hideyuki Uejima
中科院分区：
文献类型：
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作者：
Hideyuki Uejima
实验研究了电粘滞效应之一的温斯洛效应对电流体介电行为的影响。实验结果表明，颗粒表面吸附的水膜直接影响双电层的表面电荷密度，使电流体的介电常数增大，施瓦茨提出的双电层模型可以应用于温斯洛效应。利用Krieger-Maron关于非牛顿流体流动的方法，发现电场作用下的电流体可以用宾汉体来近似，其屈服剪应力与电场强度的平方成正比。此外，在电场作用下，电流体表现出粘度随时间增加的负触变性。
Dielectric behaviour of electro-fluids which show the Winslow effect, one of the electro-viscous effect, is studied experimentally. From the experimental results that water film adsorbed to the particles directly affects the surface charge density of electric double layers and makes dielectric constant of electro-fluids increase, the model of electric double layers proposed by Schwarz is able to be applied to the Winslow effect. Using Krieger-Maron's method about non-Newtonian flow, electro-fluids under an electric field are found to be approximated by the Bingham body with the yielding shear stress proportional to the square of electric field strength. Besides, electro-fluids show the negative thixotropy that the viscosity increases with time under an electric field.