Hierarchical trend model

Abstracts of papers. International workshop: Home ownership in Europe: policy and research issues, Delft, The Netherlands, November 23-24, 2006

Security and insecurity aspects of home ownership in Hungary - interaction of preconditions and motivations

Workshop 1. Session B. Abstract. The OSIS research has provided a lot of useful quantitative and qualitative data on what aspects have an influence on housing decisions and how these aspects are interrelated. The effects of the institutional changes (transition processes) in Hungary have been complemented by some further aspects that have to be...

Computer Simulations of Aircraft Wake Vortices: Good enough to quantify safety?

Vortices behind aircraft are inherently related to the generation of lift and decay very slowly. When strong, they present a safety problem for the following aircraft and for that reason specific separation distances are recommended by ICAO (the International Civil Airline Organisation). At the same time, they limit the number of aircraft that...

Single train passing through a tunnel

The contribution deals with numerical solution of a complex problem of aerodynamic loads evoked by a train motion while entering and passing through a double track tunnel. The train set consists of an electrical loco and three coaches. The loco model shape closely corresponds with a real three-system electrical locomotive developed and produced...

Unstructured periodic grid generation around 2D turbine cascades

A novel grid generation algorithm for periodic unstructured grid around two-dimensional highly-staggered turbine cascades, including multiply connected blade geometries, is presented. The idea is to generate the mesh in a transformed space in which the periodic boundaries are coincident and internal to the computational domain so that no special...

Studying flame dilution by burnt gases using numerical combustion

Recirculating burnt gases exist in most combustion systems, they play a non negligible role in gas turbines, car engines and furnaces. In gas turbine combustion chambers, burnt gases are useful at two subsequent levels. Hot recirculating combustion products contribute to flame stabilization downstream of the swirled injection and they are also...

Magnitude control of commutator errors

Non-uniform filtering of the Navier-Stokes equations expresses itself, next to the turbulent stresses, in additional closure terms known as commutator errors. These terms require explicit subgrid modeling if the non-uniformity of the filter is sufficiently pronounced. We derive expressions for the magnitude of the mean flux, the turbulent stress...

Residential choice and neighbourhood experiences in a Dutch urban poverty area; draft version

Workshop 1. Session 1.1: Poverty and identity