Calibration of modified parallel-plate rheometer through calibrated oil and lattice Boltzmann simulation

Chiara F Ferraris, Mette Rica Geiker, Nicos S Martys, Nicholas Muzzatti

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Fluid flow patterns in traditional rotational rheometers are generally well known so that rheological parameters such as viscosity can be easily calculated from experimental data of single phase fluids and analytical solutions of the flow patterns. However, when the fluid is a suspension, where some of the particles are as large as 2 mm in diameter, these rheometers may need to be modified. The distance between the shearing planes needs to be increased, which necessitates additional physical confinement of the fluid. The inclusion of a confining wall makes current analytical solutions inapplicable here. This paper presents the analysis of a modified parallel plate rheometer for measuring cement mortar and propose a methodology for calibration using standard oils and numerical simulation of the flow. A lattice Boltzmann method was used to simulate the flow in the modified rheometer, thus using an accurate numerical solution in place of the intractable analytical solution. The simulations reproduced experimental results by taking into account the actual rheometer geometry. The numerical simulations showed that small changes in the rheometer design can have a significant impact on how the rheological data should be extracted from the experimental results.
Original languageEnglish
Title of host publicationSelf-Compacting Concrete SCC 2007 : Proceedings of the Fifth International Symposium
Number of pages1055
Volume1
Place of PublicationFrance
PublisherRilem publications
Publication date2007
Edition1
Pages297-302
ISBN (Print)978-2-35158-050-9
Publication statusPublished - 2007
Event5th International Symposium on Self-Compacting Concrete - Ghent, Belgium
Duration: 3 Sep 20075 Sep 2007
Conference number: 5
http://www.rilem.net/gene/main.php?base=500218&id_publication=59

Conference

Conference5th International Symposium on Self-Compacting Concrete
Number5
CountryBelgium
CityGhent
Period03/09/200705/09/2007
Internet address

Keywords

  • Rheology, rheometer calibration, mortar rheometer

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