Dynamic response of a shear stress transducer in the sliding plate rheometer

• Published in: Journal of non-Newtonian fluid mechanics Vol. 102; no. 1; pp. 71 - 96
• Main Authors: Kolitawong, Chanyut, Jeffrey Giacomin, A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 12-01-2002; Elsevier
• Subjects: Bipolar cylindrical coordinates; Dynamic transducer calibration; Exact sciences and technology; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Physics; Shear stress transducer; Sliding plate rheometer; Transducer damping; Transducers; Dynamic transducer calibration; Sliding plate rheometer; Shear stress transducer; Bipolar cylindrical coordinates; Transducer damping; Damping; Dynamic response; Transducers; Measurement systems; Shear stress; Theoretical study; Instrumentation; Calibration
• ISSN: 0377-0257; 1873-2631
• DOI: 10.1016/S0377-0257(01)00139-2

The damping caused by polymer melt, which commonly gets into the housing of a shear stress transducer, is determined analytically. The analysis employs bipolar coordinates and is applied to Newtonian and then linear viscoelastic fluids. Results are compared with available dynamic calibration measurements, and also with previously used semi-empirical models for the transducer damping. Dimensionless graphs are then provided for estimating transducer attenuation and phase error in oscillatory shear measurements. Examples are given showing how to use the results for rheometer design and to assess measurement accuracy.