Browsing by Author "Rocha, Luiz Alberto Oliveira"

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  • Numerical analysis of the fluid-dynamic behavior of a submerged plate wave energy converter 

    Seibt, Flávio Medeiros; Couto, Eduardo Costa; Teixeira, Paulo Roberto de Freitas; Santos, Elizaldo Domingues dos; Rocha, Luiz Alberto Oliveira; Isoldi, Liércio André (2014)
    The need for clean and renewable energy sources has nowadays contributed to give relevance to the study of sea wave energy. In this context, the present work brings a computational modeling to analyze the fluid-dynamic ...
  • Numerical investigation about the improvement of the thermal potential of an Earth-Air Heat exchanger (EAHE) employing the Constructal Design method 

    Rodrigues, Michel Kepes; Brum, Ruth da Silva; Vaz, Joaquim; Rocha, Luiz Alberto Oliveira; Santos, Elizaldo Domingues dos; Isoldi, Liércio André (2015)
    The Earth-Air Heat Exchanger (EAHE) is a device used to improve the thermal condition of built environments, allowing the reduction of electrical energy consumption of traditional air conditioner systems. Fundamentally, ...
  • A numerical investigation of the resin flow front tracking applied to the RTM process 

    Souza, Jeferson Avila; Rocha, Luiz Alberto Oliveira; Amico, Sandro Campos; Vargas, Jose Viriato Coelho (2011)
    Resin Transfer Molding (RTM) is largely used for the manufacturing of high-quality composite components and the key stage during processing is the resin infiltration. The complete understanding of this phenomenon is of ...
  • Numerical investigation of turbulent forced convective flows over a pair of circular cylinders 

    Santos, Elizaldo Domingues dos; Silva, Fábio de Moraes Vaz da; Acunha Junior, Ivoni Carlos; Galarça, Marcelo Moraes; Isoldi, Liércio André; Rocha, Luiz Alberto Oliveira (2012)
    The present study presents large eddy simulation (LES) of forced convective heat transfer in transient, two-dimensional, incompressible turbulent flows over a pair of cylinders with two different arrangements: 1) with two ...
  • Numerical simulation of the resin transport through fiber reinforcement medium 

    Souza, Jeferson Avila; Rocha, Luiz Alberto Oliveira; Amico, Sandro Campos (SOUZA, Jeferson Avila; ROCHA, Luiz Alberto Oliveira; AMICO, Sandro Campos. Numerical simulation of the resin transport through fiber reinforcement medium. In: INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING – COBEM, 19., 2007, Brasília. Anais... Brasília: [s.n.], 2007. Disponível em: <http://www.abcm.org.br/anais/cobem/2007/pdf/COBEM2007-1166.pdf>. Acesso em: 25 jul. 2015., 2007)
    This paper describes the numerical simulation of the RTM (Resin Transfer Molding) process applied to the modeling of the resin transport through a fibrous reinforcement. The molding volume which is to be impregnated with ...
  • Numerical study of forced convection lid-driven cavity flows using LES (Large Eddy Simulation) 

    Santos, Elizaldo Domingues dos; Petry, Adriane Prisco; Rocha, Luiz Alberto Oliveira; França, Francis Henrique Ramos (2013)
    This study presents the LES (large eddy simulation) of forced convection in laminar and two dimensional turbulent flows when the flow reaches the steady state. The main purpose is the evaluation of a developed numerical ...
  • Numerical study of reservoir cooling by means of peltier effect 

    Farias, Rodrigo Martins; Santos, Elizaldo Domingues dos; Isoldi, Liércio André; Rocha, Luiz Alberto Oliveira (2008)
    The present work studies numerically and experimentally the water cooling process by means of natural convection inside a closed reservoir. The cooling process is performed by Peltier or Thermoelectric effect. The purpose ...
  • Numerical study on the effect of submerged depth on the horizontal plate wave energy converter 

    Seibt, Flávio Medeiros; Couto, Eduardo Costa; Santos, Elizaldo Domingues dos; Isoldi, Liércio André; Rocha, Luiz Alberto Oliveira; Teixeira, Paulo Roberto de Freitas (2014)
    The growing search for clean and renewable energy sources has given rise to the studies of exploring sea wave energy. This paper is concerned with the numerical evaluation of the main operational principle of a submerged ...
  • Otimização Geométrica de Cavidades Complexas Empregando Constructal Design 

    Garcia, Fernanda Link (2011)
    Na presente pesquisa, inicialmente foi realizada uma revisão bibliográfica dos temas que circundam a Teoria Constructal e Constructal Design, e também suas aplicações na natureza e na engenharia. Posteriormente, foi feito ...
  • Otimização geométrica de um arranjo triangular de cilindros submetido a escoamento laminar com convecção forçada 

    Galarça, Marcelo Moraes; Cardoso, Felipe Rodrigues; Razera, Andre Luis; Acunha Junior, Ivoni Carlos; Isoldi, Liércio André; Porte, Anderson Favero; Rocha, Luiz Alberto Oliveira; Santos, Elizaldo Domingues dos (2015)
    O presente trabalho numérico estuda o arranjo triangular de cilindros submetidos a escoamentos transientes, bi-dimensionais, incompressíveis, laminares e com convecção forçada por meios do método Constructal Design. As ...
  • Thermal optimization of circular bodies submitted to an intense heat flux using constructal design 

    Vergara, Leandro Cavalheiro; Santos, Elizaldo Domingues dos; Rocha, Luiz Alberto Oliveira (2009)
    The present work studies the optimization of a circular body with an intense heat flux by Constructal Design. The problem concerns the minimization of the global thermal resistance of a three-dimensional structure submitted ...
  • Thermodynamic Evaluation of a Two Stages Compression Refrigeration System Integrated to an Absorption System 

    Corrêa, Gilberto Arejano; Souza, Jeferson Avila; Prentice-Hernández, Carlos; Rocha, Luiz Alberto Oliveira (2008)
    This work is based on the principles of administration, with technical and economic data from a frigorific fishing industry, at analyzing the convenience of integrating to the existing refrigeration system (by vapor ...
  • Three-dimensional numerical modeling of RTM and LRTM processes 

    Isoldi, Liércio André; Oliveira, Cristiano Peres; Rocha, Luiz Alberto Oliveira; Souza, Jeferson Avila; Amico, Sandro Campos (2012)
    Resin Transfer Molding (RTM) is a manufacturing process in which a liquid resin is injected into a closed mold pre-loaded with a porous fibrous preform, producing complex composite parts with good surface finishing. Resin ...
  • Two-dimensional computational modeling of the soil thermal behavior due to the incidence of solar radiation 

    Brum, Ruth da Silva; Isoldi, Liércio André; Santos, Elizaldo Domingues dos; Vaz, Joaquim; Rocha, Luiz Alberto Oliveira (2013)
    Nowadays, there is a focus on finding sustainable energy sources, as well as, alternatives to rationalize the use of electrical energy. In this sense, the employment of Earth-Air Heat Exchangers (EAHE) is one technique ...
  • Two-dimensional Control Volume Modeling of the Resin Transfer in a Porous Media with a Heterogeneous Permeability Tensor 

    Souza, Jeferson Avila; Nava, Marcelo José Anghinoni; Rocha, Luiz Alberto Oliveira; Amico, Sandro Campos (2008)
    Resin Transfer Molding (RTM) is a polymer composite processing technique widely used in the aeronautics and automotive sectors. This paper describes the numerical simulation of the RTM process where Darcy’s law was used ...
  • Two-dimensional geometric optimization of an oscillating water column converter in laboratory scale 

    Gomes, Mateus das Neves; Nascimento, Cristina Dias do; Bonafini, Beatriz Leandro; Santos, Elizaldo Domingues dos; Isoldi, Liércio André; Rocha, Luiz Alberto Oliveira (2012)
    The present paper presents a two-dimensional numerical study about the geometric optimization of an ocean Wave Energy Converter (WEC) into electrical energy that has as operational principal the Oscillating Water Column ...