Browsing by Subject "Finite element method"
Now showing items 120 of 82

Conference Object
3D flow of HerschelBulkley fluids
(ASME, 1998)The flow of HerschelBulkley fluids through a sudden 3D square with expansion height ratio of 2:1 is studied numerically by solving the mass and momentum conservation equations along with a continuous constitutive relation. ...

Conference Object
Active earth thrust on walls supporting granular soils: Effect of wall movement
(IOS Press, 2013)The methods currently used in the design practice of retaining walls supporting granular soils (sand, gravel, silt, and their mixtures) assume that the soil friction angle and, consequently, the active earth pressure ...

Article
Alignment of electrospun polymer fibers using a concave collector
(2015)During recent years, electrospinning has become a powerful technique for the costeffective production of fibrous materials with diameters ranging from a few nanometers up to a few micrometers. In a conventional electrospinning ...

Article
Application of the pversion of the finite element method to elastoplasticity with localization of deformation
(1999)In this paper we discuss the use of the pversion of the finite element method applied to elastoplastic problems that exhibit sharp (but continuous) deformation gradients. The deformation theory of deviatoric, linearly ...

Article
Bearing capacity in sand under eccentric and inclined loading using a bounding surface plasticity model
(2017)The bearing capacity of strip footings on sand under inclined or eccentric loading is investigated using finite element analysis. The sand behavior is simulated using a bounding surface plasticity constitutive model based ...

Article
A C1conforming hp finite element method for fourth order singularly perturbed boundary value problems
(2016)We consider a fourth order singularly perturbed boundary value problem (BVP) in onedimension and the approximation of its solution by the hp version of the Finite Element Method (FEM). The given problem's boundary conditions ...

Article
Cessation of annular Poiseuille flows of Bingham plastics
(2007)We numerically solve the cessation of the annular Poiseuille flow of Bingham plastics for various values of the diameter ratio, using the regularized constitutive equation proposed by Papanastasiou and employing finite ...

Article
Cessation of Couette and Poiseuille flows of a Bingham plastic and finite stopping times
(2005)We solve the onedimensional cessation Couette and Poiseuille flows of a Bingham plastic using the regularized constitutive equation proposed by Papanastasiou and employing finite elements in space and a fully implicit ...

Article
Comparison of spectral and finite element methods applied to the study of the coreannular flow in an undulating tube
(2002)A Galerkin/finite element and a pseudospectral method, in conjunction with the primitive (velocitypressure) and streamfunctionvorticity formulations, are tested for solving the twophase flow in a tube, which has a ...

Article
Comparison of two methods for the computation of singular solutions in elliptic problems
(1997)We compare two numerical methods for the solution of elliptic problems with boundary singularities. The first is the integrated singular basis function method (ISBFM), a finiteelement method in which the solution is ...

Article
Compressible viscous flow in slits with slip at the wall
(1994)We study the timedependent compressible flow of a Newtonian fluid in slits using an arbitrary nonlinear slip law relating the shear stress to the velocity at the wall. This slip law exhibits a maximum and a minimum and ...

Conference Object
Compression molding of semiconcentrated fiber suspensions: Flow and fiber orientation
(Publ by ASME, 1993)The focus of this paper is compression molding of semiconcentrated 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
Compression molding using a generalized eulerian–lagrangian formulation with automatic remeshing
(1992)A generalized Eulerian‐Lagrangian approach is used to study the compression molding of viscoelastic polymers. The complete, unsteady, two‐dimensional equations of motion are used in the analysis. The White–Metzner model ...

Conference Object
Control of quantized multiagent systems with linear nearest neighbor rules: A finite field approach
(2010)We study the problem of controlling a multiagent system where each agent is only allowed to be in a discrete and finite set of states. Each agent is capable of updating its state based on the states of its neighbors, and ...

Article
Converged solutions of the Newtonian extrudateswell problem
(1999)Both the axisymmetric and the planar Newtonian extrudateswell problems are solved using the standard and the singular finite element methods. In the latter method, special elements that incorporate the radial form of the ...

Article
Convergence analysis of an hp finite element method for singularly perturbed transmission problems in smooth domains
(2013)We consider a twodimensional singularly perturbed transmission problem with two different diffusion coefficients, in a domain with smooth (analytic) boundary. The solution will contain boundary layers only in the part of ...

Article
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 ...

Conference Object
Development of confined viscoplastic flows with heterogeneous wall slip
(National Technical University of Athens, 2016)The steady, pressuredriven flow of a HerschelBulkley fluid in a channel is considered assuming that slip occurs on one wall only due to slip heterogeneities. Hence, the velocity profile is allowed to be asymmetric. The ...

Conference Object
Effects of periodic gravity modulation in microgravity convection systems
(Publ by ASME, 1993)Natural convection in an enclosure that is subjected to periodic excitations is investigated using a classical mixed Galerkin finite element method. The modulation is incorporated in the momentum equations, through a ...

Article
Empirical Bayes approach to block wavelet function estimation
(2002)Wavelet methods have demonstrated considerable success in function estimation through termbyterm thresholding of the empirical wavelet coefficients. However, it has been shown that grouping the empirical wavelet coefficients ...