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Rheological effects of strusture breakdown in semisolid slurries
(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 ...
On the early breakdown of semisolid suspensions
(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, ...
Predictions of structure breakdown, buildup and shear banding in semisolid suspensions
(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 ...
Parameter estimation for semi-solid aluminum alloys using transient experiments
(2006)
A rotating vane-cup rheometer is used to determine the rheological properties of semi-solid slurries, and a procedure is established for characterizing the rheology with emphasis given to the proper and self-consistent ...
On bubble rising in a Hele-Shaw cell filled with a non-Newtonian fluid
(2004)
The problem of a bubble rising due to buoyancy in a Hele-Shaw cell filled with a viscous fluid is a classical free-boundary problem first posed and solved by Saffman & Taylor. In fact, due to linearity of the flow equations ...
Steady Herschel-Bulkley fluid flow in three-dimensional expansions
(2001)
In this paper we study steady flow of Herschel-Bulkley fluids in a canonical three-dimensional expansion. The fluid behavior was modeled using a regularized continuous constitutive relation, and the flow was obtained ...
Transient planar squeeze flow of semi-concentrated fiber suspensions using the Dinh-Armstrong model
(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 ...
Molecular simulation of water in carbon nanotubes
(2008)
The motion of water in carbon nanotubes (CNT) by numerical procedures is calculated through molecular dynamics (MD) simulation studies. The Lennard-Jones potential is a simple MD simulations technique, which combines ...
Flow instabilities of Herschel-Bulkley fluids
(2003)
We investigate numerically the interactions of two-dimensional jets of Bingham plastic and Herschel-Bulkley fluids with a vertical surface at a distance from the die exit. This problem simulates the early stages of filling ...
Molecular dynamic simulations of carbon nanotubes in CO2 atmosphere
(2008)
This work investigates by means of molecular dynamics the filling of carbon nanotubes by carbon dioxide molecules. Nanotubes of various sizes are simulated and the resulting CO2 density calculated. The effects of various ...