Development of a Nuclear Magnetic Imaging-Based Viscometer

9414802麦卡锡该奖项旨在研究一种新技术，用于在线测量广泛剪切速率范围内的剪切粘度。核磁共振成像将被用来确定流经管道的液体的速度分布或速度谱。速度分布与诸如压降之类的辅助测量相结合，以计算作为剪切速率函数的粘度。速度剖面技术将被用来确定各种材料的剪切粘度。研究人员还将与一家设备制造商合作，开发一种基于速度谱方法的原型仪器。所开发的仪器将比商业上可用的设备具有优势，这些设备要么在单一剪切速率上进行测量，要么需要相当长的时间来在多个剪切速率下进行测量，和/或通常不能处理填充系统。这里要进行的工作对于热塑性塑料等材料的过程控制和产品分析非常重要，无论是填充的还是非填充的、稠密的泥浆和食品。

9414802 McCarthy The award is for research aimed at a new technique for in-line measurement of the shear viscosity over a wide range of shear rates. Nuclear magnetic resonance imaging will be used to determine either the velocity profile or the velocity spectrum of a fluid flowing through a tube. The velocity profile is combined with an auxiliary measurement, such as pressure drop, to calculate the viscosity as a function of shear rate. The velocity profile technique will be used to determine the shear viscosity of a wide range of materials. The researchers will also work with an equipment manufacturer to develop a prototype instrument based on the velocity spectrum method. The instrument developed will have an advantage over commercially available equipment which either make measurements over a single shear rate, require considerable time to make measurements at multiple shear rates, and/or cannot generally handle filled systems. The work to be performed here is important for process control and product analysis of materials like thermoplastics, both filled and unfilled, dense slurries and foodstuffs.