Browsing by Subject "Suspensions (fluids)"

Now showing items 1-12 of 12

    • Article  

      Breakup of a capillary bridge of suspensions 

      Alexandrou, Andreas N.; Bazilevskii, A. V.; Entov, V. M.; Rozhkov, A. N.; Sharaf, A. (2010)
      The breakup of liquid bridges under the action of capillary forces is used for studying the rheology of suspensions under stretching. The experiments were performed with suspensions of finegrained (3-30 μm) sand in glycerin ...
    • Conference Object  

      Compression molding of semi-concentrated fiber suspensions: Flow and fiber orientation 

      Ahmed, Alauddin; Alexandrou, Andreas N. (Publ by ASME, 1993)
      The focus of this paper is compression molding of semi-concentrated fiber suspensions. During compression molding a premeasured amount of raw material (charge) is placed between two halves of a die. The die is then closed ...
    • Article  

      Continuum model for the phase behavior, microstructure, and rheology of unentangled polymer nanocomposite melts 

      Stephanou, Pavlos S.; Mavrantzas, V. G.; Georgiou, Georgios C. (2014)
      We introduce a continuum model for polymer melts filled with nanoparticles capable of describing in a unified and self-consistent way their microstructure, phase behavior, and rheology in both the linear and nonlinear ...
    • Conference Object  

      Injection molding of dilute and semi-dilute fiber suspensions 

      Alexandrou, Andreas N.; Ahmed, Alauddin (Publ by ASME, 1992)
      The focus of this paper is unsteady flow of semi-dilute fiber suspensions in complex geometries. These flows are typical of injection molding problems in which the raw material in granular form, usually plastic resin mixed ...
    • Article  

      On the early breakdown of semisolid suspensions 

      Alexandrou, Andreas N.; Georgiou, Georgios C. (2007)
      Semisolid materials are suspensions of metal alloys which are processed while in a mushy state. In this state, the suspensions behave as viscoplastic materials with time-dependent material properties. During processing, ...
    • Article  

      On the early breakdown of semisolid suspensions 

      Alexandrou, Andreas N.; Georgiou, G. (2007)
      Semisolid materials are suspensions of metal alloys which are processed while in a mushy state. In this state, the suspensions behave as viscoplastic materials with time-dependent material properties. During processing, ...
    • Article  

      On the modeling of semisolid suspensions 

      Alexandrou, Andreas N. (2008)
      Due to the distinct rheology of semisolid slurries the process has well established advantages over competing near-net-shape manufacturing technologies. Despite the obvious advantages of the process its adoption by the ...
    • Article  

      Predictions of structure breakdown, buildup and shear banding in semisolid suspensions 

      Alexandrou, Andreas N.; Constantinos, N.; Georgiou, Georgios C. (2008)
      When SSM material is subjected to a sudden transient the rate of buildup (aging) is negligible compared to the rate of breakdown (shear rejuvenation). While this is generally true, due to prolonged processing or the geometry ...
    • Article  

      Predictions of structure breakdown, buildup and shear banding in semisolid suspensions 

      Alexandrou, Andreas N.; Constantinos, N.; Georgiou, G. (2008)
      When SSM material is subjected to a sudden transient the rate of buildup (aging) is negligible compared to the rate of breakdown (shear rejuvenation). While this is generally true, due to prolonged processing or the geometry ...
    • Article  

      Thixotropic rheology of semisolid metal suspensions 

      Burgos, G. R.; Alexandrou, Andreas N.; Entov, V. (2001)
      Understanding the time-dependent flow behavior of semisolid materials (SSM) is essential for the simulation of semisolid processes. During processing, the structure of the material changes with the processing history due ...
    • Article  

      Transient planar squeeze flow of semi-concentrated fiber suspensions using the Dinh-Armstrong model 

      Alexandrou, Andreas N.; Mitsoulis, E. (2007)
      Numerical simulations are undertaken for the transient squeeze flow between parallel plates under a constant load. The conservation equations are solved via the finite element method in space and the Crank-Nicolson method ...
    • Article  

      Unsteady flow of semi-concentrated suspensions using finite deformation tensors 

      Ahmed, A.; Alexandrou, Andreas N. (1994)
      The interest in the theoretical investigation of the flow behavior of fiber suspensions during manufacturing processes has increased considerably due to the increased interest in the use of composite materials. The unsteady ...