Browsing by Author "Philippou, Maria"

Now showing items 1-7 of 7

    • Conference Object  

      Cessation flows of bingham plastics with slip at the wall 

      Damianou, Y.; Philippou, Maria; Kaoullas, G.; Georgiou, Georgios C. (National Technical University of Athens, 2013)
      We use finite elements in space and a fully implicit scheme in time in order to solve the cessation of axisymmetric Poiseuille flow of a Bingham plastic under the assumption that slip occurs along the wall. The Papanastasiou ...
    • Article  

      Cessation of Newtonian circular and plane Couette flows with wall slip and non-zero slip yield stress 

      Philippou, Maria; Damianou, Y.; Miscouridou, X.; Georgiou, Georgios C. (2017)
      We solve analytically the cessation flows of a Newtonian fluid in circular and plane Couette geometries assuming that wall slip occurs provided that the wall shear stress exceeds a critical threshold, the slip yield stress. ...
    • Article  

      Cessation of viscoplastic Poiseuille flow with wall slip 

      Damianou, Y.; Philippou, Maria; Kaoullas, G.; Georgiou, Georgios C. (2014)
      We solve numerically the cessation of axisymmetric Poiseuille flow of a Herschel-Bulkley fluid under the assumption that slip occurs along the wall. The Papanastasiou regularization of the constitutive equation is employed. ...
    • 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 ...
    • 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 ...
    • Conference Object  

      Stopping times in cessation flows of Bingham plastics with slip at the wall 

      Philippou, Maria; Damianou, Y.; Kaoullas, G.; Georgiou, Georgios C. (2012)
      We solve numerically the cessation of axisymmetric Poiseuille flow of a Bingham plastic assuming that slip occurs along the wall. A power-law expression is used to relate the wall shear stress to the slip velocity. The ...
    • 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 ...