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Now showing items 151-157 of 157
Numerical simulation of the extrusion of strongly compressible Newtonian liquids
(2008)
The axisymmetric and plane extrusion flows of a liquid foam are simulated assuming that the foam is a homogeneous compressible Newtonian fluid that slips along the walls. Compressibility effects are investigated using both ...
Comparison of spectral and finite element methods applied to the study of the core-annular flow in an undulating tube
(2002)
A Galerkin/finite element and a pseudo-spectral method, in conjunction with the primitive (velocity-pressure) and streamfunction-vorticity formulations, are tested for solving the two-phase flow in a tube, which has a ...
On the combined effects of slip, compressibility, and inertia on the Newtonian extrudate-swell flow problem
(2013)
We solve both the planar and axisymmetric extrudate-swell flows of a compressible Newtonian liquid with Navier slip at the wall, using the finite-element method in space and a fully-implicit finite-difference scheme in ...
Development lengths in Newtonian Poiseuille flows with wall slip
(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 ...
Numerical study of the combined effects of inertia, slip, and compressibility in extrusion of yield stress fluids
(2014)
The axisymmetric extrudate swell flow of a compressible Herschel–Bulkley fluid with wall slip is solved numerically. The Papanastasiou-regularized version of the constitutive equation is employed, together with a linear ...
An efficient finite element method for treating singularities in Laplace's equation
(1991)
We present a new finite element method for solving partial differential equations with singularities caused by abrupt changes in boundary conditions or sudden changes in boundary shape. Terms from the local solution ...
Stopping times in cessation flows of Bingham plastics with slip at the wall
(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 ...