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Viscous Fluid Flow

- T. Papanastasiou, G. Georgiou, A. Alexandrou
- Chemistry
- 24 November 1999

* Presents the principles of control volume early for use throughout the book * Emphasizes the constitutive equation that relates deformation to stress. * Examines in detail the flow of Newtonian… Expand

1,077 143

Steady Herschel–Bulkley fluid flow in three-dimensional expansions

- A. Alexandrou, Timothy M McGilvreay, Gilmer R. Burgos
- Mathematics
- 1 September 2001

Abstract 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,… Expand

103 4

Wall Shear Rates in Circular Couette Flow of a Herschel-Bulkley Fluid

- Maria Chatzimina, G. Georgiou, A. Alexandrou
- Art
- 2009

The objective of this work is to study quantitatively the errors introduced by the standard Newtonian and power-law assumptions used in the determination of the material properties of viscoplastic… Expand

24 3- PDF

On the determination of yield surfaces in Herschel-Bulkley fluids

- Gilmer R. Burgos, A. Alexandrou, V. Entov
- Physics
- 26 April 1999

Herschel–Bulkley fluids are materials that behave as rigid solids when the local stress τ is lower than a finite yield stress τ0, and flow as nonlinearly viscous fluids for τ>τ0. The flow domain then… Expand

143 2

Thixotropic rheology of semisolid metal suspensions

- Gilmer R. Burgos, A. Alexandrou, V. Entov
- Materials Science
- 19 March 2001

Abstract 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… Expand

74 2

Flow development of Herschel–Bulkley fluids in a sudden three-dimensional square expansion

- Gilmer R. Burgos, A. Alexandrou
- Physics
- 26 April 1999

The flow development of Herschel–Bulkley fluids in a sudden three-dimensional square expansion is studied numerically. The flow is modeled using the mixed-Galerkin finite element formulation to solve… Expand

60 2

On the steady-state advancement of fingers and bubbles in a Hele–Shaw cell filled by a non-Newtonian fluid

- A. Alexandrou, V. Entov
- Materials Science
- 1 February 1997

29 2

An inverse finite element method for directly formulated free boundary problems

- A. Alexandrou
- Mathematics
- 1 October 1989

In free boundary problems, in addition to the primary field variables, velocity, pressure and temperature, unknown geometric parameters need to be evaluated. A characteristic feature of the problems… Expand

19 2

Shear rejuvenation, aging and shear banding in yield stress fluids

- A. Alexandrou, Nicholas Constantinou, G. Georgiou
- Materials Science
- 1 May 2009

The purpose of this work is to simulate shear rejuvenation and aging effects in shear thinning yield stress fluids in a typical rotational rheometer and to provide a common framework to describe the… Expand

29 1- PDF

Solution of the square lid-driven cavity flow of a Bingham plastic using the finite volume method

- A. Syrakos, G. Georgiou, A. Alexandrou
- Mathematics, Computer Science
- ArXiv
- 1 May 2013

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