Collaborative design in a context of sustainability: The epistemological an practical implications of the precautionary principle for design

Sustainable design is an approach that seeks to adopt an ethic of the future, where the vision of the solutions is based on a temporal and spatial perspective that is predominantly long-term and global. Design is characterized by its projective and ambivalent nature, and therefore a conscious effort to anticipate the outcomes of design...

Multilevel Iterative Methods and Deflation

In this paper, we show that the deflation method can be viewed as a possible implementation of the CG method with multilevel preconditioner. Further, we demonstrate efficiency and robustness of different implementations of multilevel preconditioners with different "coarse grid" spaces by solving a simple model problem.

Filtered gas-solid momentum transfer models

To account for meso-scale phenomena in coarse grid simulations, correlation terms appearing in the filtered gas-solid flow equations have to be modeled. Filtered models for the gas-solid momentum transfer are focused on. The latter consists of the drag force on the one hand and the distribution of the gas phase pressure gradient over the phases...

DNS simulations of lean premixed flame kernels with flamelet generated manifolds: An overview

In this paper recent developments in the application of the method of flamelet generated manifolds (FGM) to simulations of turbulent premixed combustion are considered. Initially the method was developed for kinetic reduction for simulations of laminar combustion using stationary solvers. Recently the method was extended to direct numerical...

Adaptive Control Space Structure for Anisotropic Mesh Generation

The article concerns problem of automated generation of anisotropic finite element meshes on 3D surfaces. The meshes are created using a modification of Delaunay incremental insertion algorithm working in Riemannian space (using metric transformation approach). During the meshing process the generator relies on a special structure (called...

Towards Interactive Indoor Thermal Comfort Simulation

The paper addresses the current state of the development of a computational steering environment (CSE) for interactive indoor thermal comfort simulation by utilizing high-performance supercomputing facilities. The CSE consists of a parallel CFD kernel, a fast spacetree-based 3D mesh generator and an integrated virtual reality-based visualization...

Domain Decomposition Approach for Automatic Parallel Generation of 3D Unstructured Grids

The desire to simulate more and more geometrical and physical features of technical structures and the availability of parallel computers and parallel numerical solvers which can exploit the power of these machines have lead to a steady increase in the number of grid elements used. Memory requirements and computational time are too large for...

IMESH: Generating quality Meshes from images

Techniques devoted to generate a triangular mesh from images either take as starting point a segmented image or generate a mesh without distinguishing different structures contained in the image. The need for pre-segmentation and the absence of well defined structures may rule out the use of the resulting mesh in some applications, as numerical...

Large Eddy Simulation of the flow around a wind turbine blade

Large Eddy Simulations (LES) of incompressible turbulent flow around a wind turbine blade at a chord Reynolds number of 5000 are performed using high-order spectral/hp element method (SEM). The method and the early results of the simulations are presented. Some requirements with respect to mesh generation for the SEM concerning h- and p...

Simulating Drag Crisis for a Sphere Using Skin Friction Boundary Conditions

In this paper we use a General Galerkin (G2) method to simulate drag crisis for a sphere, where the unresolved turbulent boundary layer is modeled as a decreasing skin friction.