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Theoretical analyses and numerical simulations of the torsional mode for two acoustic viscometers with preliminary experimental tests

, : Theoretical analyses and numerical simulations of the torsional mode for two acoustic viscometers with preliminary experimental tests. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 55(3): 648-658

A rigorous analysis of the torsional modes in both a cylindrical wave guide and the associated static viscous fluid field has been conducted from the solid and the fluid wave equations and the coupled boundary conditions. As a result, two acoustic viscometer models, along with four independent equations connecting the density and the viscosity of the fluid with the attenuation and the phase velocity of the torsional wave in the wave guide, have been developed. The analysis shows that the product of the viscosity and the density of the fluid can be measured from the end reflection coefficient of the torsional wave in the wave guide and that both the viscosity and the density can be determined simultaneously from either the phase velocity or the attenuation of the torsional wave in a single cylindrical wave guide. For the simultaneous measurements of the viscosity and the density, the independent equations have to be solved numerically, for example, using Matlab (The MathWorks, Natick, MA), given either the attenuation or the phase velocity in the wave guide that is surrounded by the fluid. To demonstrate the technical feasibility, numerical simulations have been conducted to discern viscosity, phase velocity, and density, all versus attenuation, at different frequencies, and with variable dimension of a molybdenum rod, so that both the advantages and the disadvantages of the simultaneous measurements can be explored. In the end, to test the two models, preliminary experiments on two viscous standards were conducted at 23 degrees C, and good agreements have been achieved between the viscosities measured from both models and for both standards.


PMID: 18407854

DOI: 10.1109/TUFFC.2008.689

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Grantham, MJ., 2000: Birds of Alas Purwo National Park, East Java. This paper details some of the more important and interesting records from Alas Purwo National Park in East Java. Most of these come from the author's work in the Park from May 1997 until September 1999, though records are included from many...

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Martín Ramos, M.; Fernández Martínez, F.; Barreiro Miranda, E., 2001: Cytogenetic abnormalities in acute lymphoblastic leukemia. Cytogenetic analysis of blast cells in childhood acute lymphoblastic leukemia has led to the recognition of specific non-random chromosomal abnormalities with prognostic value. Most patients with ALL show karyotype abnormalities, either in chromos...

Deimer, E.; Hohenberg, G.; Wickenhauser, J., 1976: Diagnosis and differential diagnosis of the terminal esophagus.. On hand of a few selected cases diagnostic and differential diagnostic problems of the cardia are discussed. Radiological and endoscopical values are presented.

Delamare-Deboutteville, C., 1960: Linajes marinos que han penetrado en las a guas subterraneas continentales. Un problema de biogeografia actual. Holmbergia, 61: 27-44

Mestyán, J.; Soltész, G.; Dobák, E.; Fekete, M.; Schultz, K., 1972: The post-natal changes in the circulating free amino acid pool in the newborn infant. 4. The relationship between the changes of the plasma amino acid ratio, -amino-n, free fatty acid and blood glucose concentration after birth. Biology of the Neonate 21(3): 229-238

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Schaefer H.; Baerwald C., 1992: Intestinal osteopathy after partial gastric resection. 26 years after a partial gastric resection (Billroth II) for recurrent gastric ulcer a 62-year-old man developed severe intestinal osteopathy. For three years he had increasing pain in the lower back and hip with a noticeable waddling gait. Serum...