Browsing by Author "Kountouriotis, Zacharias"
Now showing items 1-7 of 7
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Article
Development lengths in Newtonian Poiseuille flows with wall slip
Kountouriotis, Zacharias; Philippou, Maria; Georgiou, Georgios C. (2016)The effect of wall slip on the development of planar and axisymmetric Newtonian Poiseuille flows is studied by means of finite element simulations. The Navier slip law is employed. i.e., it is assumed that the slip velocity ...
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Conference Object
Development of confined viscoplastic flows with heterogeneous wall slip
Panaseti, Pandelitsa; Philippou, Maria; Kountouriotis, Zacharias; Georgiou, Georgios C. (National Technical University of Athens, 2016)The steady, pressure-driven flow of a Herschel-Bulkley fluid in a channel is considered assuming that slip occurs on one wall only due to slip heterogeneities. Hence, the velocity profile is allowed to be asymmetric. The ...
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Doctoral Thesis
Modelling of the liquid slag behaviour in the continuous casting mould [electronic resource]
Kountouriotis, Zacharias (University of Greenwich, 2011)
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Article
Numerical study of the combined effects of inertia, slip, and compressibility in extrusion of yield stress fluids
Kountouriotis, Zacharias; Georgiou, Georgios C.; Mitsoulis, Evan C. (2014)The axisymmetric extrudate swell flow of a compressible Herschel–Bulkley fluid with wall slip is solved numerically. The Papanastasiou-regularized version of the constitutive equation is employed, together with a linear ...
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Article
On the combined effects of slip, compressibility, and inertia on the Newtonian extrudate-swell flow problem
Kountouriotis, Zacharias; Georgiou, Georgios C.; Mitsoulis, Evan C. (2013)We solve both the planar and axisymmetric extrudate-swell flows of a compressible Newtonian liquid with Navier slip at the wall, using the finite-element method in space and a fully-implicit finite-difference scheme in ...
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Article
A study of various factors affecting Newtonian extrudate swell
Mitsoulis, Evan C.; Georgiou, Georgios C.; Kountouriotis, Zacharias (2012)Finite-element simulations have been undertaken for the benchmark problem of extrudate swell present in extrusion. Both cases of planar and axisymmetric domains were considered under laminar, isothermal, steady-state ...
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Article
Viscoplastic flow development in tubes and channels with wall slip
Philippou, Maria; Kountouriotis, Zacharias; Georgiou, Georgios C. (2016)The development of Bingham plastic flow in tubes and channels is investigated numerically using the Papanastasiou regularization and finite element simulations. It is assumed that slip occurs along the wall following ...