RUI: Equilibrium Structure and Structure Formation in Magnetorheological Fluids

9803618 Gross该奖项支持在一个以本科为主的机构研究磁流变液的平衡结构和结构动力学的研究。在磁场中，微米大小的颗粒链形成。在更长的时间尺度上，这些链条可能会结合成厚厚的“柱子”。特别令人感兴趣的是：（1）在低体积分数区域，链之间的相互作用似乎是排斥的，柱是如何形成的，以及（2）柱的内部和外部平衡结构是什么。PI将在一所以本科为主的机构开展研究，研究一类由微米级颗粒组成并对磁场作出反应的“复杂流体”，例如，流体的粘度可以随着小磁场的应用而急剧增加，从机油的稠度增加到花生的稠度。在外加磁场中，流体的小颗粒将形成结构。更好地了解这些结构是如何形成的是拟议研究的目标。这些“磁活性”流体用于许多应用，如减震器、制动器和可控离合器。***

9803618 Gross This award supports research at a predominantly undergraduate institution to study equilibrium structures and structural dynamics in magnetorheological fluids. In a magnetic field, chains of micron-sized particles form. On longer time scales, the chains may bind into thick `columns.' Of particular interest are: (1) how do columns form in the low volume fraction region where the interactions between chains appears to be repulsive, and (2) what is the internal and external equilibrium structure of columns. %%% The PI will carry out research at a predominantly undergraduate institution into a class of `complex fluids' that consist of micron-sized particles and respond to magnetic fields, for example, the viscosity of the fluid can dramatically increase with the application of a small magnetic field from the consistency of motor oil to that of peanut. In an applied magnetic field, the small particles of the fluid will form structures. A better understanding of how these structures form is an objective of the proposed research. These `magnetically active' fluids are used in numerous applications such as vibration dampers, brakes, and controllable clutches. ***