author = "Zienkiewicz, O.C."

Encontrado 28 documentos, página mostrada 1 de 3

CBS versus GLS stabilization of the incompressible Navier–Stokes equations and the role of the time step as stabilization parameter

Description: In this work we compare two apparently different stabilization procedures for the finite element approximation of the incompressible Navier–Stokes equations. The first is the characteristic‐based split (CBS). It combines the characteristic Galerkin method to deal with convection dominated flow...
Language(s): Inglés

A viscous shell formulation for the analysis of thin sheet metal forming

Description: A finite element method to analyse large plastic deformations of thin sheets of metal is presented. The formulation is based on an extension of the general viscoplastic flow theory for continuum problems to deal with thin shells. Axisymmetric situations are considered first and here the simple two n...
Language(s): Inglés

Finite volume VS finite element. Is there really a choice

Description: The finite volume method appears to be a particular case of finite elements with a non Galerkin weighting. It is course less accurate for self adjoint problems but has some computationally useful features for first order equations involving only surface integrals. For certain problems this is a subs...
Language(s): Inglés

Search for general fluid mechanics algortihm

Description: The paper outlines the formulation of a novel algorithm which can be used for the solution of both compressible and incompressible Navier-Stokes or Euler equations. Full incompressibility can be dealt with if the algorithm is used in tis semi-explicit form and its structure permits arbitrary interpo...
Language(s): Inglés

A general algorithm for compressible and incompressible flow—Part I. the split, characteristic‐based scheme

Description: The paper outlines the formulation of a novel algorithm which can be used for the solution of both compressible and incompressible Navier‐Stokes or Euler equations. Full incompressibility can be dealt with if the algorithm is used in its semi‐explicit form and its structure permits arbitrary interpo...
Language(s): Inglés

On application of two superconvergent recovery procedures to plate problems

Description: In this paper a study is performed on application of two recovery methods, i.e. Superconvergent Patch Recovery (SPR) and the Recovery by Equilibrium of Patches (REP), to plate problems. The two recovery methods have been recognized to give similar results in adaptive solutions of two dimensional str...
Language(s): Inglés

A fractional step method for the solution of the compressible Navier-Stokes equations

Description: In this paper we present a summary of the splitting technique for both compressible and incompressible flows previously proposed in [22, 23, 7]. Also, we extend it to the case of a fully implicit treatment of the viscous and convective terms of the momentum equations. For incompressible flows, this ...
Language(s): Inglés

A general algorithm for compressible and incompressible flows. Part III: The semi‐implicit form

Description: In this paper we consider some particular aspects related to the semi‐implicit version of a fractional step finite element method for compressible flows that we have developed recently. The first is the imposition of boundary conditions. We show that no boundary conditions at all need to be imposed ...
Language(s): Inglés

A general methodology for deriving shear constrained Reissner-Mindlin plate elements

Description: In this paper the necessary requirements for the good behaviour of shear constrained Reissner–Mindlin plate elements for thick and thin plate situations are re‐interpreted and a simple explicit form of the substitute shear strain matrix is obtained. This extends the previous work of the author...
Language(s): Inglés

The Characteristic‐Based Split (CBS) scheme—a unified approach to fluid dynamics

Description: This paper presents a comprehensive overview of the characteristic‐based methods and Characteristic‐Based Split (CBS) scheme. The practical difficulties of employing the original characteristic schemes are discussed. The important features of the CBS scheme are brought out by studying several proble...
Language(s): Inglés

Encontrado 28 documentos, página mostrada 1 de 3

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