Numerical modelling of compressible two-phase flows

This paper presents a hierarchy of compressible two-phase flow models. It is shown that using Chapman-Enskog expansions in the limit of zero relaxation time toward the various equilibria that exist in these flows, a full set of models of decreasing complexity can be constructed. At the top of this hierarchy, we have a complete seven equation...

Numerical control of normal velocity by normal stress for interaction between an incompressible fluid and an elastic curved arch

We study the fluid-structure coupled problem between an incompressible fluid and an elastic curved arch. The fluid flow is modeled by 2-D steady Stokes equations with normal velocity boundary condition on the curved interface and the arch verifies a particular 1-D case of the thin shell theory of Koiter. We present an optimal control formulation...

Cartesian Discretisations for Fluid-Structure Interaction - Efficient Flow Solver

The simulation of multiphysical scenarios has become a more and more important task of scientific computing within the last years. Due to their simplicity compared to monolithic approaches (solving a unique model for the whole scenario), partitioned approaches are widespread. They allow for a reusage of existing and established solvers for the...

NURBS-enhanced finite element method

An improvement of the classical finite element method is proposed. It considers an exact representation of the geometry by means of the usual CAD description of the boundary with Non-Uniform Rational B-Splines (NURBS). For elements not intersecting the boundary, a standard finite element interpolation and numerical integration is used....

A Finite Element Interior Penalty Method for MHD in heterogeneous domains

The Maxwell equations in the MHD limit in heterogeneous domains composed of conducting and nonconducting regions are solved by using Lagrange finite elements and by enforcing continuities across interfaces using an interior penalty technique. The method is shown to be stable and convergent and is validated by convergence tests. It is used to...

Computations of flows with interfaces using arbitrary Lagrangian Eulerian method

This work is devoted to the accurate simulation of incompressible two phase flows. The core of our methodology is the use of interface resolving meshes and the arbitrary Lagrangian-Eulerian (ALE) description of the fluid kinematics. Our numerical scheme is based on second order finite elements, a fractional step ? time discretisation, and a...

Advanced human body modelling to support designing products for physical interaction

We are using many designed artefacts in our daily life. These artefacts are typically in physical interaction with the human body, and cause stresses and deformations inside the tissues. When these stresses exceed a given level, the proper physiological functioning of the tissues is limited, and ergonomics discomfort or even medical...

Rock expansion and compaction at the marker scale in gas producing reservoirs

Finite element models for the steady state analysis of moving loads

The analysis of structures subjected to fast moving loads is a subject of growing interest in railway and pavement engineering. The applications of transient analyses using finite element models, however, are still very limited. The faster a load moves the more elements we need to model the structure. Even at fast workstations and main frame...

Design of cut-outs in shell structures

Some observations on element performance in isochoric and dilatant plastic flow

User's manual for the computer program CUFUS: Quick design procedure for a CUt-out in a FUSelage version 1.0

Numerical simulation of localization phenomena using gradient plasticity anf finite elements

Review and selection of methods for structural reliability analysis

Robust finite elements for 3D-analysis of rubberlike materials

Analysis of linear multigrid methods for elliptic differential equations with discontinuous and anisotropic coefficients

Analysis of concrete fracture in "direct" tension