Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Georgiou, G. C."
Now showing items 1-12 of 12
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Article
Cessation of the lid-driven cavity flow of Newtonian and Bingham fluids
Syrakos, A.; Georgiou, G. C.; Alexandrou, Andreas N. (2016)We provide benchmark results for a transient variant of the lid-driven cavity problem, where the lid motion is suddenly stopped and the flow is left to decay under the action of viscosity. Results include Newtonian as well ...
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Article
Determining true material constants of semisolid slurries from rotational rheometer data
Alexandrou, Andreas N.; Georgiou, G. C.; Economides, E. A.; Modigell, M. (2016)In this work we revisit the issue of obtaining true material constants for semisolid slurries. Therefore, we consider the circular Couette flow of Herschel-Bulkley fluids. We first show how true constants can be obtained ...
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Article
Flow development in compression of a finite amount of a Bingham plastic
Florides, G. C.; Alexandrou, Andreas N.; Georgiou, G. C. (2007)The flow and shape evolution during the compression of a finite amount of a Bingham plastic is investigated by means of numerical simulations. The problem relates to the popular compression test used for the rheological ...
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Performance of the finite volume method in solving regularised Bingham flows: Inertia effects in the lid-driven cavity flow
Syrakos, A.; Georgiou, G. C.; Alexandrou, Andreas N. (2014)We extend our recent work on the creeping flow of a Bingham fluid in a lid-driven cavity, to the study of inertial effects, using a finite volume method and the Papanastasiou regularisation of the Bingham constitutive model ...
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Article
Preface to Special Issue: Papers from HSR 2017 - 8th International Meeting of the Hellenic Society of Rheology, Limassol, Cyprus, July 12-14, 2017
Georgiou, G. C.; Alexandrou, Andreas N. (2018)
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Conference Object
Rheological effects of strusture breakdown in semisolid slurries
Alexandrou, Andreas N.; Florides, G. C.; Georgiou, G. C.; Apelian, D. (Affiliation: Department of Mechanical and Industrial Engineering, University Cyprus, P.O.Box 20537, 1678 Nicosia, CyprusAffiliation: Department of Mathematics and Statistics, University of Cyprus, P.O.Box 20537, 1678 Nicosia, CyprusAffiliation: Metal Processing Institute, WPI, Worcester, MA, United StatesCorrespondence Address: Alexandrou, A.N.Department of Mechanical and Industrial Engineering, University Cyprus, P.O.Box 20537, 1678 Nicosia, Cyprus, 2004)An essential element for the integration of the semisolid metal (SSM) process in the production of complex commercial components is the availability of accurate mathematical and computational tools that could describe both ...
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Article
Solution of the square lid-driven cavity flow of a Bingham plastic using the finite volume method
Syrakos, A.; Georgiou, G. C.; Alexandrou, Andreas N. (2013)We investigate the performance of the finite volume method in solving viscoplastic flows. The creeping square lid-driven cavity flow of a Bingham plastic is chosen as the test case and the constitutive equation is regularised ...
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Conference Object
Solution of viscoplastic flows with the finite volume / multigrid method
Syrakos, A.; Georgiou, G. C.; Alexandrou, Andreas N. (National Technical University of Athens, 2013)We investigate the performance of the finite volume method in solving viscoplastic flows. The square lid-driven cavity flow of a Bingham plastic is chosen as the test case and the constitutive equation is regularised as ...
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Article
Squeeze flow of semi-solid slurries
Alexandrou, Andreas N.; Florides, G. C.; Georgiou, G. C. (2013)A standard method used to determine material properties of semi-solid slurries is the squeeze flow experiment
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Article
Thixotropic flow past a cylinder
Syrakos, A.; Georgiou, G. C.; Alexandrou, Andreas N. (2014)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 ...
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Article
A two-dimensional numerical study of the stick-slip extrusion instability
Taliadorou, E.; Georgiou, G. C.; Alexandrou, Andreas N. (2007)The time-dependent, compressible extrusion of a Carreau fluid is solved over the reservoir-die-extrudate region using finite elements in space and a fully implicit scheme in time. A nonmonotonic slip law based on experimental ...
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Viscoplastic fluids: From theory to application (VPF2009), Limassol, Cyprus, 1-5 November, 2009
Alexandrou, Andreas N.; Georgiou, G. C.; Ovarlez, G. (2011)