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Saint-Barthelemy-de-Vals, France

Park J.-H.,Catholic School of Engineering
Theoretical Computer Science | Year: 2016

Given two disjoint vertex-sets, S=(s1,...,sk) and T=(t1,...,tk) in a graph, a paired many-to-many k-disjoint path cover between S and T is a set of pairwise vertex-disjoint paths (P1,...,Pk) that altogether cover every vertex of the graph, in which each path Pi runs from si to ti. A family of hypercube-like interconnection networks, called restricted hypercube-like graphs, includes most non-bipartite hypercube-like networks found in the literature, such as twisted cubes, crossed cubes, Möbius cubes, recursive circulant G(2m,4) of odd m, etc. In this paper, we show that every m-dimensional restricted hypercube-like graph, m≥5, with at most f vertex and/or edge faults being removed has a paired many-to-many k-disjoint path cover between arbitrary disjoint sets S and T of size k each, subject to k≥2 and f+2k≤m+1. The bound m+1 on f+2k is the best possible. © 2016.

Ortega M.A.,ITA Technology Institute of Aeronautics | Girardi R.M.,ITA Technology Institute of Aeronautics | Silvestrini J.H.,Catholic School of Engineering
International Journal for Numerical Methods in Fluids | Year: 2012

This project focuses on the wake behind a two-dimensional blunt-trailing-edged body. The body has an elliptical nose followed by a straight section that ends in a blunt base. For this geometry, the boundary layer separation points are defined and fixed. This permits a better assessment of the vital influence of the boundary layers upon the wake. It is hoped that the study of this special geometry will contribute to a better understanding of the wake flow. The main aim of this article is to study the topology of the wake by means of direct numerical simulation (DNS). The idea is to mimic some experimental work techniques. In an experiment, by means of proper synchronization, one is able to arrive at the mean-in-the-phase fields. In the present work, similar data are obtained through the use of numerical tools. The topology of the wake flow in terms of the movement of the coherent structures, fields of Reynolds stresses, position of saddles and centers, is obtained for certain values of the body's aspect ratio. A comparison with the circular cylinder experimental data is also provided. An important result is the finding of some specific stress distributions around the main structures. The stress level lines are a hint of where the energy transfer of the mean flow to the turbulence is more intense. © 2011 John Wiley & Sons, Ltd.

Catholic School of Engineering | Entity website

FONCTIONS Devenir Ingnieur ECAM dveloppe des comptences transverses et une vraie polyvalence. Les Ingnieurs ECAM Gnraliste accdent des fonctions de production, conseil, recherche, conception, qualit, etc ...

Catholic School of Engineering | Entity website

Devenir ingnieur autrement

Catholic School of Engineering | Entity website

Produire des connaissances nouvelles qui servent directement la formation par limplication directe des lves-ingnieurs dans ces travaux

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