Probabilistic Analysis at Ultimate Limit State of Strip Footings Resting on a Spatially Varying Soil Using Subset Simulation Approach

The failure probability of geotechnical structures with spatially varying soil properties is generally computed using Monte Carlo simulation (MCS) methodology. This approach is well known to be very time-consuming when dealing with small failure probabilities. One alternative to MCS is the subset simulation approach. This approach was mainly...

Scheduling process: Using one-day scheduling on multi-family projects to reduce delivery time

The past fifty years has seen many changes in the construction process, but little has changed in the area of scheduling for most projects. There have been advances in the software used to manage schedules, but the same theories and practices have been used for decades. This process works well and will continue to be norm on most projects. Some...

Accelerating Krylov solvers with low rank correction

In this paper we present some aspects of recent works we have been developping on preconditioning techniques for accelerating Krylov solvers that are based on low rank corrections of a prescribed preconditioner. For SPD linear systems, we investigate the behaviour of some techniques based on spectral approaches when the eigenelements are only...

A conservative MURD scheme on moving domains: Application to three-dimensional free surface flows

We introduce a monotonic and conservative numerical scheme for the resolution of the linear advection problem set on a moving domain. The scheme is based on an extension to moving domains of the Multidimensional Upwind Residual Distributive (MURD) approach. The properties ensured by the residual distribution schemes set on fixed domains are not...

Numerical investigation of the aerodynamic noise from a forward-facing step

In the present study, aerodynamic noise from a forward-facing step is numerically investigated for Reynolds number based on the step height, Reh=8,000 and flow Mach number, M=0.03. A three-dimensional flow over the forward-facing step is calculated by the incompressible large eddy simulation (LES), while its acoustic field is solved by the...

Solving harmonic linear problems in unsteady turbomachinery flows using a preconditioned GMRES solver

The linear harmonic approach has been applied for solving problems involving for example blade vibrations or unsteady blade row interaction effects in multistage axial compressors and turbines. The flow is decomposed into a time averaged flow and an unsteady flow perturbation which are governed by the Reynolds Averaged Navier Stokes (RANS) and...

Linear versus nonlinear approaches for the stability analysis of aluminium production cells

The modelling of magnetohydrodynamics (MHD) phenomena in aluminium electrolysis cells is a challenging problem. The basic equations are the MHD equations in parabolic form, for two immiscible fluids. Among the various nonlinearities in the model, one is due to the moving interface between the two fluids. The basic question that numerical...

Influence of Coriolis forces on the dynamic of a turbulent jet

The influence of Coriolis forces is studied under realistic conditions on a jet in atmospheric medium. Under the Boussinesq approximation, the relative thickness of the jet defines a small parameter in the flow. This parameter governs the asymptotic expansion of the analysis. Using a linear spectral approach, two-point closure correlation...

Aerodynamic Shape Optimization by means of Sequential Linear Programming Techniques

An optimization framework for aerodynamic design on unstructured meshes has been implemented. It includes a finite volume solver based upon a median-dual discretization, its discrete adjoint, and shape parameterization and mesh moving/deforming algorithms. The framework elements are coupled and linked to a Sequential Quadratic Programming (SQP)...

A comparison between a direct and a multigrid sparse linear solvers for highly heterogeneous flux computations

Subsurface hydraulic properties are mainly governed by the heterogeneity of the porous medium considered. Our work aims at characterizing the asymptotic dispersion coefficients for highly heterogeneous permeability fields triggered by advection and constant local dispersion-diffusion. We have developed a fully parallel software for simulating...

Extensions of the complex Jacobi iteration to simulate photonic wavelength scale components

We have extended the complex Jacobi iteration to simulate nonlinear optical components. The size of these components is comparable to the used wavelength (µm). In this paper we will give an overview of the technique and several simulation results. The algorithm uses a central difference analogue of the Helmholtz equation. The used nonlinearity...

Stabilization of Kelvin-Helmholtz instabilities in 3D linearized Euler equations using a non-dissipative discontinuous Galerkin method

We present in this paper a time-domain Discontinuous Galerkin dissipation-free method for the transient solution of the three-dimensional linearized Euler equations around a steady-state solution. In the general context of a non-uniform supporting flow, we prove, using the well-known symmetrization of Euler equations, that some aeroacoustic...