GOALI: Fluid-Particle Interaction and Confinement in Structured Fluids

abstractcts - 9908912本科。目的是研究胶体铁磁流体的粘性流动及其在磁场存在下在固体壁面附近的特殊行为。结合实验、建模和数值模拟技术，研究铁磁流体纳米结构与宏观流动和传热特性之间的联系。新设计的扫描纳米流变仪、表面力仪、近场光学显微镜、磁扫描力显微镜和多普勒测速仪将用于获取不同长度尺度的实验信息。表面将被化学和结构修饰，以便研究它们对固体壁附近的附着力和粘度的影响。粒子动力学及其团聚的分子模拟将通过本构关系纳入宏观数值模拟。有限元三维模拟铁磁流体的流动和传热将在实际情况下进行测试。这是一项校企合作（GOALI）提案，涉及埃克森美孚研发公司和能源国际公司。如果成功，该项目将发展铁磁流体在工业装置中的应用的基本理解和预测方法，与变压器和电机的冷却系统直接相关。

AbstractCTS-9908912B.A. Finlayson, U. of WashingtonThe objective is to investigate the viscous flow of colloidal ferrofluids and their particular behavior near solid walls in the presence of magnetic fields. The connection between the ferrofluid nanostructure and macroscopic flow and heat transfer characteristics will be investigated using a combination of experimental, modeling and numerical simulation techniques. A newly designed scanning nanorheometer, a surface force apparatus, near-field optical microscopy, magnetic scanning force microscopy and Doppler velocimetry will be used to obtain experimental information at several length scales. Surfaces will be chemically and structurally modified in order to study their effects on adhesion and viscosity near solid walls. Molecular simulations of particle dynamics and their agglomeration will be included in the macroscopic numerical simulations via constitutive relationships. Finite element three-dimensional simulation of flow and heat transfer in ferrofluids will be tested for realistic situations. This is a collaborative university-industry (GOALI) proposal involving Exxon R&D and Energy International, Inc. If successful, the project will develop fundamental understanding and predictive methods for the application of ferrofluids in industrial installations, with immediate relevance in cooling systems in transformers and motors.