UNS: Interfacial Flows Driven by Antisymmetric Stresses in Ferrofluids

CBET -151113 PI：Rinaldi，CarlosFerrofluids是对磁场做出响应的流体。 本计画探讨磁性粒子在悬浮液体中所组成之铁磁流体之流体动力学。 该项目的重点是流体-空气界面附近的流体运动，在该界面附近的流动和本体流体中的流动之间通过实验观察到了有趣的连接。在定义明确的流动中，测量了各种界面附近的铁磁流体的速度。 结果将被用来测试理论的有效性，描述了适当的动力学条件的接口。 该项目将为研究生和本科生提供研究培训，并将开发基于网络的教育视频，探索铁磁流体的流体动力学。该项目的目标是通过实验验证合适的界面边界条件的线性和内部角动量在铁磁流体-空气，铁磁流体-非铁磁流体，和铁磁流体-铁磁流体界面。 将测量各种原型流的界面附近和体相流体中的速度分布，结果将用于开发可扩展到更复杂几何形状（包括铁磁流体液滴）的模型。 结果应有助于澄清适当的界面条件，用于流体系统，表现出反对称应力，这反过来，可以纳入工程设计的各种应用，涉及铁磁流体接口。

CBET - 151113PI: Rinaldi, CarlosFerrofluids are fluids that respond to magnetic fields. This project examines the fluid dynamics of a ferrofluid composed of magnetic particles in a suspending liquid. The project focuses on the motion of the fluid near a fluid-air interface where interesting connections have been observed experimentally between flow near the interface and flow in the bulk fluid. The velocity of the ferrofluid near various kinds of interfaces will be measured in well-defined flows. The results will be used to test the validity of theory that describes the appropriate dynamical conditions at the interface. The project will provide research training to graduate and undergraduate students and will develop Web-based educational videos that explore the fluid dynamics of ferrofluids.The objective of the project is to validate experimentally appropriate interfacial boundary conditions on linear and internal angular momentum at ferrofluid-air, ferrofluid-non-ferrofluid, and ferrofluid-ferrofluid interfaces. Velocity profiles near the interfaces and in the bulk fluids will be measured for various prototype flows, and results will be used to develop models that can be extended to more complicated geometries, including ferrofluid droplets. The results should help clarify the appropriate interfacial conditions to use for fluid systems that exhibit antisymmetric stresses, which, in turn, can be incorporated into engineering design of various applications involving ferrofluids with interfaces.