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  • Tensões térmicas em blocos de concreto armado 

    Araújo, José Milton de (2013)
    Os grandes blocos de fundação dos edifícios e das pontes podem apresentar fissuras superficiais já nas primeiras horas após a concretagem. Em virtude do grande volume de concreto, a temperatura no interior do bloco pode ...

  • Teor de cloretos próximos a superficie do concreto em ambientes maritimos 

    Guimarães, André Tavares da Cunha; Castro, Pedro; Nunes, Jorge Luiz Oleinik (2007)
    Um dos mais importante fator que influenciam a penetraqso de cloretos no concreto 6 a concentraqgo em ambos tipos de perfis: com a presenqa ou nao de um pico. Neste trabalho discute-se a concentraqgo superficial de ...

  • Testes de modelos parabólicos de refração-difração na modelação da refração de ondas 

    Barletta, Rodrigo do Carmo; Melo Filho, Eloi; Franco, Davide; Romeu, Marco Antônio Rigola (2006)
    Neste trabalho os resultados de altura de ondas monocromáticas de diferentes opções de modelos parabólicos de Refração-Difração propagando-se em rampas planas foram testados e comparados. A necessidade de se especificar ...

  • Testes iniciais com áreas de dissipação de energia para inclusão de ilhas em modelos Ref-Dif parabólicos 

    Romeu, Marco Antônio Rigola; Melo Filho, Eloi; Franco, Davide; Barletta, Rodrigo do Carmo (2006)
    Os modelos numéricos de Refração-difração de onda são baseados no método da aproximação parabólica da equação do declive suave. Na utilização deste tipo de modelo em batimetrias que apresentam quebra-mares ou ilhas existe ...

  • Técnicas aplicadas no fundeio e manutenção de um ondógrafo direcional 

    Pimenta, Felipe Mendonça; Mendes, Daniel Antoniazzi Ribeiro; Souto, Andrei Meira Castro; Melo Filho, Eloi; Vincentini Neto, Francisco Luiz; Franco, Davide; Pereira, Nilton Cezar; Castelão, Guilherme Pimenta; Hammes, Guilherme Rafael; Barletta, Rodrigo do Carmo; Romeu, Marco Antônio Rigola (2013)
    Aqui descrevemos as técnicas aplicadas na implantação e manutenção do Programa de Informação Costeira (PIC on—line), que manteve um ondógrafo fundeado ao largo da Ilha de Santa Catarina entre Dezembro de 2001 e Novembro ...

  • The influence of delta ferrite in the AISI 416 stainless steel hot workability 

    Cardoso, Paulo Henrique Sanchez; Kwietniewski, Carlos Eduardo Fortis; Porto, João Paulo Sarmento; Reguly, Afonso; Strohaecker, Telmo Roberto (2001)
    Delta ferrite in martensitic stainless steels may have an adverse effect on the mechanical properties of these materials at high temperature. The occurrence of such phase is determined by the material chemical composition ...

  • The Temperature Response of Compact Tubular Microalgae Protobioreactors 

    Ribeiro, Robert Luis Lara; Mariano, André Bellin; Dilay, Emerson; Souza, Jeferson Avila; Ordonez, Juan Carlos; Vargas, Jose Viriato Coelho (2009)
    A mathematical and computational modeling of a photobioreactor for the determination of the transient temperature behavior in compact tubular microalgae photobioreactors is presented. The model combines theoretical concepts ...

  • Thermal cracking of concrete pile caps 

    Araújo, José Milton de (2014)
    The large pile caps of buildings and bridges may have superficial cracks already in the early hours after concreting. Due to the large volume of concrete, the temperature inside the pile cap may reach very high values, as ...

  • Thermal Model for Electromagnetic Launchers 

    Zhao, Hairong; Souza, Jeferson Avila; Ordonez, Juan Carlos (2008)
    This paper presents a 3D model for the determination of the temperature field in an electromagnetic launcher. The large amounts of energy that are dissipated into the structure of an electromagnetic launcher during short ...

  • Thermal modeling of helium cooled high-temperature superconducting DC transmission cable 

    Souza, Jeferson Avila; Ordonez, Juan Carlos; Hovsapian, Rob; Vargas, Jose Viriato Coelho (IEEE, 2011)
    The recent increase in distributed power generation is highlighting the demand to investigate and implement better and more efficient power distribution grids. High-temperature superconducting (HTS) DC transmission cables ...

  • 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 ...

  • Thermodynamic optimization of fluidized catalytic cracking (FCC) units 

    Souza, Jeferson Avila; Vargas, Jose Viriato Coelho; Ordonez, Juan Carlos; Martignoni, Waldir Pedro; Meien, Oscar Felippe von (2011)
    In this paper, a thermodynamic optimization procedure for FCC riser units has been developed. The formulation uses a 2D fluid flow and kinetic model to provide the necessary information for the optimization process. The ...

  • Three dimensional flow simulations with the finite element technique over a multi-stage rocket 

    Scalabrin, Leonardo Costa; Azevedo, João Luiz Filgueiras de; Teixeira, Paulo Roberto de Freitas; Awruch, Armando Miguel (2004)
    Aerodynamic flow simulations over the first Brazilian satellite launch vehicle, VLS, during its first-stage flight are presented. The three dimensional compressible flow is modeled by the Euler equations and a Taylor-Galerkin ...

  • Three dimensional simulation of high compressible flows using a subcycling algorithm for time integration 

    Teixeira, Paulo Roberto de Freitas; Awruch, Armando Miguel (1999)
    An algorithm to simulate 3-D high compressible flows using the finite element method and a multi-time-step integration technique with subcycles is presented in this work. An explicit two-step Taylor-Galerkin scheme is ...

  • Three-dimensional launch simulation and active cooling analysis of a single-shot electromagnetic railgun 

    Zhao, Han; Souza, Jeferson Avila; Ordonez, Juan Carlos (2014)
    An electromagnetic railgun is one of the applications of electromagnetic launchers, which are devices used to accelerate projectiles to velocities exceeding those attained with conventional propelling systems. A magnetic ...

  • 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 ...

  • Three-dimensional simulation of high compressible flows using a multi-time-step integration technique with subcycles 

    Teixeira, Paulo Roberto de Freitas; Awruch, Armando Miguel (2001)
    An algorithm to simulate three-dimensional high compressible flows using the finite element method and a multi-time-step integration technique with subcycles is presented in this work. An explicit two-step Taylor–Galerkin ...

  • Tipo de blocos de concreto para estrutura hidráulica de proteção às ondas marinhas e análise visual dos tetrápodes da Barra de Rio Grande 

    Migliorini, Alessandra Vieira; Guimarães, André Tavares da Cunha (2008)
    Devido à insatisfação com as características hidráulicas e estruturais relacionadas aos blocos de concreto cúbicos eparalelepipédicos utilizados na estrutura de quebra-mares, foi lançado no mercado uma variedade de ...

  • Transient Modeling and Simulation of Compact Photobioreactors 

    Ribeiro, Robert Luis Lara; Mariano, André Bellin; Souza, Jeferson Avila; Vargas, Jose Viriato Coelho (2008)
    In this paper, a mathematical model is developed to make possible the simulation of microalgae growth and its dependency on medium temperature and light intensity. The model is utilized to simulate a compact photobioreactor ...