Publication type: Conference other
Type of review: Peer review (abstract)
Title: Impact of fouling on mechanical resonator-based viscosity sensors : comparison of experiments and numerical models
Authors: Brunner, Daniel
Häusler, Klaus
Kumar, Sunil
Khawaja, Hassan
Moatamedi, Moji
Boiger, Gernot Kurt
Published in: The International Journal of Multiphysics
Proceedings: Multiphysics 2018
Conference details: International Conference of Multiphysics, Krakow, Poland, 13-14 December 2018
Issue Date: 2018
Publisher / Ed. Institution: International Society of Multiphysics
ISSN: 2409-1669
Language: English
Subjects: Fouling; Mechanical-resonator; Numerical model; Experiment; Viscosity sensor; Fluid-solid interaction
Subject (DDC): 530: Physics
Abstract: Monitoring fluid properties such as viscosity is crucial in many industrial processes. Viscosity sensors based on mechanical vibrations can offer a solution to monitor the fluid viscosity online. However, such sensors’ sensitivity drop due to fouling and it is a common problem in industrial processes. The goal of the presented study is to investigate the effects of a purely elastic fouling layer on the sensing element of a viscosity sensor using experiments and numerical models. The sensor used in this study is a probe style torsional resonator. The measuring principle of this sensor is correlating the damping of the resonating system to the viscosity-density product of the surrounding fluid. In case of fouling, the characteristics of the resonator are affected by the fouling layer. In the given study, the impact on the damping due to the fouling layer is investigated by conducting the experiments and comparing it with three different numerical models. In experiments, the sensor has been coated with metal in the sensing area. Then, the sensor has been immersed into different fluids to determine the impact of the metal layer on the viscous induced damping. To understand the physical implications of the deposit on the resonating system three different numerical models have been developed. These models describe the resonator with increasing degree of detail. First model is using single mass spring system, second model is two masses with three springs system, and third model is 3D structural model solved in COMSOL® Multiphysics. In all of the above models, the fluid-structure interaction is weakly coupled with an analytical solution for the flow field. These models are compared and tested against the experiments.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in collections:Publikationen School of Engineering

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