Browsing by Subject "Slip yield stress"

Now showing items 1-8 of 8

    • 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 in a square duct with wall slip 

      Damianou, Y.; Kaoullas, G.; Georgiou, Georgios C. (2015)
      We solve numerically the cessation of the pressure-driven Poiseuille flow of a Bingham plastic under the assumption that slip occurs along the wall following a generalized Navier-slip law involving a non-zero slip yield ...
    • 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  

      Newtonian flow in a triangular duct with slip at the wall 

      Georgiou, Georgios C.; Kaoullas, G. (2013)
      We consider the Newtonian Poiseuille flow in a tube whose cross-section is an equilateral triangle. It is assumed that boundary slip occurs only above a critical value of the wall shear stress, namely the slip yield stress. ...
    • Article  

      Newtonian Poiseuille flows with slip and non-zero slip yield stress 

      Kaoullas, G.; Georgiou, Georgios C. (2013)
      The Newtonian Poiseuille flow is considered for various geometries, under the assumption that wall slip occurs above a critical value of the wall shear stress known as, the slip yield stress. In the axisymmetric and planar ...
    • Article  

      Slip yield stress effects in start-up Newtonian Poiseuille flows 

      Kaoullas, G.; Georgiou, Georgios C. (2013)
      Analytical solutions are derived for various start-up Newtonian Poiseuille flows assuming that slip at the wall occurs when the wall shear stress exceeds a critical value, known as the slip yield stress. Two distinct regimes ...
    • Article  

      Viscoplastic Poiseuille flow in a rectangular duct with wall slip 

      Damianou, Y.; Georgiou, Georgios C. (2014)
      We solve numerically the Poiseuille flow of a Herschel-Bulkley fluid in a duct of rectangular cross section under the assumption that slip occurs along the wall following a slip law involving a non-zero slip yield stress. ...