（机电学院，2013年秋季第15周）

 

【主  题】：Effect of Dispersion Procedures and Methods on the Stability of Oil-Based Nanofluids（油基纳米液体的扩散效应和稳定方法研究）

【主讲人】：Gary Barber教授，美国奥克兰大学汽车摩擦中心主任

【时  间】：2013年12月11日（星期三）上午10：20-12：00

【地  点】：机械工程楼七层活动中心

【主  办】：研究生工作部

【承  办】：机电学院

 

【主讲人简介】：

Gary Charles Barber教授本科毕业于密歇根大学，并分别于休斯顿大学和密歇根大学获得机械工程学硕士和博士学位。他主要从事汽车摩擦学方向的研究，曾在底特律柴油公司任高级工程师职务。Gary Charles Barber 著有《润滑与摩擦学手册：理论和设计》、《模拟发动机零部件的摩擦磨损性能研究》、《麦克米兰百科全书：摩擦学》、《摩擦学百科全书：汽车摩擦学》等专著章节，发表各类学术期刊文章数十余篇。他是《摩擦学汇刊》和《润滑工程》的副编辑。

The term nanofluid was first proposed by Choi in 1995 and has been studied ever since due to their unique characteristics. Much research has been done investigating the potential for thermal conductivity enhancement, especially in water/ethelyne glycol solutions for coolant applications. Friction and wear reduction have been noted in oil base nanofluids which illustrates their potential use in lubricant applications. Despite their great promise for thermal and tribological properties, the issue of preparing stable and well-dispersed solutions has been the major problem with this new classification of fluid. To correctly analyze the performance of a nanofluid, it first must be characterized in order to ensure a sufficient preparation procedure is used. The more stable and monodispersed the nanofluid is, the more accurate the experimental performance representation. In this study, the effects of different dispersion procedures and methods on the stability of Al2O3 oil-based nanofluids were investigated. The stability of the nanofluids prepared by an ultrasonic bath and an ultrasonic disruptor was compared. Sample concentration of surfactant and nanoparticles was studied for solution stability.

Gary Barber教授将从多方面讲述纳米流体的相关内容，特别是在冷却剂中的应用以及如何正确分析一个纳米流体的性能。他研究了不同的色散的程序和对Al2O3的油性纳米流体的稳定性。并且对制备超声波浴和超声波破坏剂的纳米流体的稳定性进行了比较。研究了表面活性剂和纳米颗粒的样品浓度以及溶液的稳定性。