New emerging multimedia standards, like the MPEG-4 standard allow the creation of virtual or synthetic acoustical environments. To auralize an environment from its geometric description, simulation algorithms for acoustic wave propagation are required. The different methods used for computational modeling of room acoustics can be divided into three groups [1]: statistical models, ray-based mode...

This review discusses the attempts that have been made by geologists to numerically simulate the evolution of microstructures in rocks. The strengths and weaknesses of the differing techniques are compared and equivalent materials science results are included. In particular we focus on the application of techniques that have been used to predict texture development, grain boundary geometries, d...

Quantum Dots are semiconductor heterostructures, in which the free carriers are confined to a small region by potential barriers in all three directions of space (3D). If the size of the region is less than the electron wavelength, the electronic states become quantized at discrete energy levels as it happens in an atom. Applications: micro and optoelectronic devices, modelling systems at the a...

The modelling of physical systems often leads to partial or directly to ordinary differential equations. The solution of these equations usually is a dominant part of the total computational costs for a simulation or animation, therefore being the main focus of this chapter. Before addressing the numerical solution of ODEs the temporal discretization or (time) integration we take a brief look a...

A numerical simulation of the Mechanofusion (MF) device, which is used for powder surface modification (dry particle coating, mixing, etc.), is carried out using the discrete element modeling (DEM) technique. An existing, widely used, cohesionless contact model (Walton– Braun) is used for two-dimensional simulation studies, in which the particles are assumed to be frictional, elastic-plastic sp...

We propose here a model and a numerical scheme to compute the motion of rigid particles interacting through the lubrication force. In the case of a particle approaching a plane, we propose an algorithm and prove its convergence towards the solutions to the gluey particle model described in [19]. We propose a multi-particle version of this gluey model which is based on the projection of the velo...

an analytical nonlinear stress-strain model and a microscopic damage index for confined and unconfined concretes together with a macroscopic damage index for reinforced concrete (rc) structures under cyclic loading are proposed. in order to eliminate the problem of scale effect, an adjustable finite element computer program was generated to simulate rc structures subjected to cyclic loading. by...

in this study, gas evolution in a vertical electrochemical cell is investigated numerically with a modified two-fluid model. the mathematical model involves solution of separate transport equation for the gas and liquid phases with an allowance to inter-phase transfer of mass and momentum. the governing equations are discreted via the finite volume technique and then are solved by the simple al...