dc.contributor.author | Syrakos, A. | en |
dc.contributor.author | Georgiou, G. C. | en |
dc.contributor.author | Alexandrou, Andreas N. | en |
dc.creator | Syrakos, A. | en |
dc.creator | Georgiou, G. C. | en |
dc.creator | Alexandrou, Andreas N. | en |
dc.date.accessioned | 2019-05-06T12:24:44Z | |
dc.date.available | 2019-05-06T12:24:44Z | |
dc.date.issued | 2014 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48890 | |
dc.description.abstract | We study the flow of a thixotropic fluid around a cylinder. The rheology of the fluid is described by means of a structural viscoplastic model based on the Bingham constitutive equation, regularised using the Papanastasiou regularisation. The yield stress is assumed to vary linearly with the structural parameter, which varies from zero (completely broken structure) to one (fully developed skeleton structure), following a first-order rate equation which accounts for material structure break-down and build-up. The results were obtained numerically using the Finite Element Method. Simulations were performed for a moderate Reynolds number of 45, so that flow recirculation is observed behind the cylinder, but vortex shedding does not occur. The effects of the Bingham number and of the thixotropy parameters are studied. The results show that the viscous character of the flow can be controlled within certain limits through these parameters, despite the fact that the Reynolds number is fixed. © 2014 Elsevier B.V. | en |
dc.language.iso | eng | en |
dc.source | Journal of Non-Newtonian Fluid Mechanics | en |
dc.subject | Colloids | en |
dc.subject | Finite element method | en |
dc.subject | Reynolds number | en |
dc.subject | Structural parameter | en |
dc.subject | Thixotropy | en |
dc.subject | Yield stress | en |
dc.subject | Viscoplasticity | en |
dc.subject | Cylinders (shapes) | en |
dc.subject | First order rate equation | en |
dc.subject | Flow past a cylinder | en |
dc.subject | Material structure | en |
dc.subject | Moderate Reynolds numbers | en |
dc.subject | Papanastasiou regularisation | en |
dc.subject | Regularisation | en |
dc.subject | Viscoplastic models | en |
dc.title | Thixotropic flow past a cylinder | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.jnnfm.2014.08.008 | |
dc.description.volume | 220 | |
dc.description.startingpage | 44 | |
dc.description.endingpage | 56 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.description.totalnumpages | 44-56 | |