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- Norberto Mangiavacchi, Antonio Castelo, Murilo F. Tomé, José A. Cuminato, Maria Luísa Bambozzi de Oliveira, Sean McKee
- SIAM J. Scientific Computing
- 2005

We propose a novel vortex core line extraction method based on the λ2 vortex region criterion in order to improve the detection of vortex features for 3D flow visualization. The core line is defined as a curve that connects λ2 minima restricted to planes that are perpendicular to the core line. The basic algorithm consists of the following stages: (1) λ2… (More)

In this article recent advances in the Marker and Cell (MAC) method will be reviewed. The MAC technique dates back to the early 1960s at the Los Alamos Laboratories and this article starts with a historical review, and then a brief discussion of related techniques. Improvements since the early days of MAC (and the Simplified MAC – SMAC) include automatic… (More)

- V. G. Ferreira, Analice Costacurta Brandi, +4 authors José M. Balthazar
- 2007

In the computation of turbulent flows via turbulence modeling, the treatment of the convective terms is a key issue. In the present work, we present a numerical technique for simulating two-dimensional incompressible turbulent flows. In particular, the performance of the high Reynolds κ-ε model and a new high-order upwind scheme (adaptative QUICKEST by… (More)

This paper presents numerical simulations of incompressible fluid flow problems in the presence of a magnetic field. The equations governing the flow consist of the Navier-Stokes equations of fluid motion coupled with Maxwell ́s equations of electromagnetics. The study of fluid flows under the influence of a magnetic field and with no free electric charges… (More)

- V. G. Ferreira, F. A. Kurokawa, Cassio M. Oishi, M. K. Kaibara, Antonio Castelo, José A. Cuminato
- Mathematics and Computers in Simulation
- 2009

In the context of normalized variable formulation (NVF) of Leonard and total variation diminishing (TVD) constraints of Harten, this paper presents an extension of a previous work by the authors for solving unsteady incompressible flow problems. The main contributions of the paper are threefold. First, it presents the results of the development and… (More)

- João de Quintanilha, Meleiro de Araújo Martins, +4 authors Luís M. Correia
- 2013

The main purpose of this thesis was to study the impact of MIMO and Carrier Aggregation in LTE-Advanced networks, concerning capacity, QoS and interference. A model for the evaluation of network downlink performance was developed and implemented in a multi-user simulator. Results were obtained after simulating the new improvements in a replicated urban… (More)

- G. A. B. Lima, V. G. Ferreira, +5 authors L. V. A. Scalvi
- Applied Mathematics and Computation
- 2012

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