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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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EL
| URI | http://purl.tuc.gr/dl/dias/CFA593B4-33CA-448F-8675-6522A08EA145 | - |
| Identifier | http://portal.tee.gr/portal/page/portal/PUBLICATIONS/SCIENTIFIC_PUBLICATIONS/2010/3o_teuhos%202010/02_3839.pdf | - |
| Language | en | - |
| Language | el | - |
| Extent | 15 | en |
| Title | Choosing the best rheological model for water-bentonite suspensions | en |
| Creator | Maglione Roberto | en |
| Creator | Kelesidis Vasilis | en |
| Creator | Κελεσιδης Βασιλειος | el |
| Description | Δημοσίευση σε επιστημονικό περιοδικό | el |
| Content Summary | Flow of water-bentonite dispersions is encountered in a variety of situations in oil-well drilling, chemical, petroleum and waste treatment industries and in complex geometries like pipe, concentric and eccentric annulus, and rectangular ducts. Most of the time, the flow of these dispersions is laminar and analytical solutions have been developed for a variety of rheological models like the Casson, the Robertson-Stiff, and the Herschel-Bulkley models. Couette viscometers are often used to determine the applicable rheological model but most of the time the shear rates experienced by the fluids are often computed as if the fluids were Newtonian or using a narrow gap approximation, giving thus only approximate values of the rheological parameters for the particular model. Recent advances, though, enable the computation of the true shear rates for any of the three models mentioned. Using Couette viscometric data from the literature, the three models are applied to obtain the rheological parameters using Newtonian and true shear rates in the narrow gap of the viscometer and the best fit model is determined. The flow parameters in laminar flow for pipes and annuli, such as velocity profile, pressure drop gradient as well as the onset of the transition to turbulent flow are then predicted. Differences in the rheological behaviour for all three models and from using Newtonian or true shear rates, as well as on the prediction of the flow parameters are evaluated and discussed. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-10-29 | - |
| Date of Publication | 2010 | - |
| Bibliographic Citation | R. Maglione, V.C Kelessidis, " Choosing the best Rheological model for water-bentonite suspensions," Tech. Chron. Sci. J, no. 3, pp. 211-226 , 2010. | en |
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