Theoretical and experimental investigation of fluid rheology effects on modulated ultrasound propagation

Date

2014-09-01

Author

Ozkok, Okan
Uludağ, Yusuf

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A mathematical model is developed and presented to capture the effect of viscoelastic nature of a material on modulated ultrasound (US) pulses. The model is established by considering perturbation of material elements subject to modulated US pulses and by introducing the exponential relaxation of the perturbed fluid elements with a spectrum of time constants. Both the model and experimental findings revealed that consecutive perturbation of a material via the modulated US pulses enabled to probe the relaxation times of similar order of magnitudes to the frequency of the US modulation while filtering out the impact of other relaxation times on the US measurement. The US experimental results were verified by those of a conventional rheometer. Hence carrying out measurements at different US modulation frequencies in the Hz ranges seems to allow one to obtain the relaxation time spectrum of the investigated material in the time scales of milliseconds to seconds.

Subject Keywords

Silt-clay mixtures, Seismic foundation performance, Foundation failure, Cyclic triaxial test, Cyclic strength, Relaxation time, Viscoelasticity, Modulated sound signal propagation, Ultrasonic characterization techniques, Fluid rheology

URI

https://hdl.handle.net/11511/43255

Journal

ULTRASONICS

DOI

https://doi.org/10.1016/j.ultras.2014.05.014

Collections

Department of Chemical Engineering, Article

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Citation Formats

O. Ozkok and Y. Uludağ, “Theoretical and experimental investigation of fluid rheology effects on modulated ultrasound propagation,” ULTRASONICS, pp. 2034–2041, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43255.