Development of a Nuclear Magnetic Imaging-Based Viscometer

小行星9414802 该奖项旨在研究一种在线测量广泛剪切速率范围内剪切粘度的新技术。 核磁共振成像将用于确定流过管道的流体的速度分布或速度谱。 将速度分布与辅助测量（例如压降）组合以计算作为剪切速率的函数的粘度。 速度剖面技术将用于确定各种材料的剪切粘度。 研究人员还将与设备制造商合作，开发基于速度谱方法的原型仪器。 所开发的仪器将具有优于市售设备的优点，所述市售设备在单一剪切速率下进行测量，在多个剪切速率下进行测量需要相当长的时间，和/或通常不能处理填充的系统。 在此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，包括填充和未填充的热塑性塑料、高密度浆料和食品。

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.