BIBLIOS

   Ciências References Management System

Visitor Mode (Login)
Need help?


Back

Publication details

Document type
Journal articles

Document subtype
Full paper

Title
The Torsional Quartz-Crystal Viscometer

Participants in the publication
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
 CQE
 Stephen M. Richardson (Author)
University of London, Imperial College of Science and Technology
 William A. Wakeham (Author)
University of Southampton
Summary
The paper describes the theory and practice associated with the torsional quartz-crystal viscometer for the measurement of the viscosity of Newtonian Fluids. It is an instrument that has been less often used than its quality merits, but it has the distinct advantages, shared with the vibrating-wire device, that it involves no bulk motion of fluid or a solid and that all measurements can be electrical.\\nThe temperature range that can be covered by the instrument is from 2K to 650K and pressures have reached as much as 100MPa. The review summarises the most recent theory of the instrument and carefully sets out all of the many conditions that have to be satisfied by design so that a practical instrument conforms to the theory. Most of the conditions are readily satisfied. Two working equations are presented that could be used to evaluate the viscosity using the frequency at resonance of the crystal and the bandwidth of that resonance when the crystal is immersed in the fluid and in vacuo. It is explained that at present only one of these equations should be used for the evaluation.\\nSeveral configurations of instruments that have been employed for measurements over a wide range of conditions are briefly described as well as the corrections necessary to operate the instrument with the highest accuracy. The overall relative uncertainty attainable with the instrument ranges from 0.005 to 0.02 at a 95% confidence level, depending upon the fluid density.

Date of Publication
2024-06-25

Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
International Journal of Thermophysics

Publication Identifiers
ISSN - 0195-928X

Publisher
Springer Science and Business Media LLC

Volume
45
Number
7

Document Identifiers
DOI - https://doi.org/10.1007/s10765-024-03389-1
URL - https://doi.org/10.1007/s10765-024-03389-1


Export

APA
Carlos A. Nieto de Castro, Stephen M. Richardson, William A. Wakeham, (2024). The Torsional Quartz-Crystal Viscometer. International Journal of Thermophysics, 45, ISSN 0195-928X. eISSN . https://doi.org/10.1007/s10765-024-03389-1

IEEE
Carlos A. Nieto de Castro, Stephen M. Richardson, William A. Wakeham, "The Torsional Quartz-Crystal Viscometer" in International Journal of Thermophysics, vol. 45, 2024. 10.1007/s10765-024-03389-1

BIBTEX
@article{64158, author = {Carlos A. Nieto de Castro and Stephen M. Richardson and William A. Wakeham}, title = {The Torsional Quartz-Crystal Viscometer}, journal = {International Journal of Thermophysics}, year = 2024, volume = 45 }