Ara es mostren els items 1-20 de 21

  • A level-set model for mass transfer in bubbly flows 

    Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2019-08-01)
    Article
    Accés restringit per política de l'editorial
    A level-set model is presented for simulating mass transfer or heat transfer in two-phase flows. The Navier-Stokes equations and mass transfer (or heat transfer) equation are discretized using a finite volume method on a ...
  • A one-phase Stefan problem with size-dependent thermal conductivity 

    Font Martínez, Francesc (2018-07-02)
    Article
    Accés restringit per política de l'editorial
    In this paper a one-phase Stefan problem with size-dependent thermal conductivity is analysed. Approximate solutions to the problem are found via perturbation and numerical methods, and compared to the Neumann solution for ...
  • Comparison of drop evaporation models on hot surface 

    González Esteve, Adrià (Universitat Politècnica de Catalunya / Politecnico di Milano, 2014)
    Treball Final de Grau
    Accés obert
    Realitzat a/amb:  Politecnico di Milano
    This project is a study of how a sessile drop evaporates on a hot surface. Some existing models of droplet evaporation are explained, understood, simulated and compared. This project also provides an expression of drop ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: I. Assessment of eddy viscosity models 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Escaler Puigoriol, Francesc Xavier (2005-07-15)
    Article
    Accés restringit per política de l'editorial
    Computational fluid dynamics plays an important role in engineering design. To gain insight into solving problems involving complex industrial flows, such as impinging gas-jet systems (IJS), an evaluation of several eddy ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: II. Application to an industrial cooling system device 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Valero Ferrando, Ma. del Carmen (2005-07-15)
    Article
    Accés restringit per política de l'editorial
    A numerical analysis of the flow behavior in industrial cooling systems based on arrays of impinging jets has been performed, using several eddy viscosity models to determine their modeling capabilities. For the cooling ...
  • Conductive and convective heat transfer in fluid flows between differentially heated and rotating cylinders 

    López, José M.; Marqués Truyol, Francisco; Àvila Cañellas, Marc (2015-11-01)
    Article
    Accés obert
    The flow of fluid confined between a heated rotating cylinder and a cooled stationary cylinder is a canonical experiment for the study of heat transfer in engineering. The theoretical treatment of this system is greatly ...
  • Disseny d'un sistema de recuperació d'aigua per una planta de producció d'hidròxid càlcic 

    Sánchez Hidalgo, Núria (Universitat Politècnica de Catalunya, 2008-06)
    Projecte/Treball Final de Carrera
    Accés restringit per decisió de l'autor
    La conservació del medi i dels recursos naturals és un dels plantejaments que realitzen actualment les indústries per tal de realitzar la seva tasca productiva d'una manera més sostenible. El present projecte té com a ...
  • La ecuación del calor 

    Caffarelli, Luis (2014-01-31)
    Altres
    Accés obert
    La ecuación del calor fue propuesta por Fourier en 1807-en su memoria sobre la propagación del calor en los cuerpos sólidos. En ella proponía además el germen de lo que pasaria a ser la Teoría de las Series de Fourier. Tan ...
  • Fachadas disipadoras de calor: recursos para el diseño arquitectonico 

    Hernández Morel, Gabriela de los Milagros (Universitat Politècnica de Catalunya, 2016-01)
    Projecte Final de Màster Oficial
    Accés obert
    Internal heat gains in a building represent a problem when heat dissipation from devices or users, does not have escape routes other than natural ventilation, especially in warm climates. This paper aims to collect data ...
  • Finite element analysis of the thermal behavior of a RepRap 3D printer liquefier 

    Jerez Mesa, Ramón; Travieso Rodriguez, Jose Antonio; Corbella, Xavier; Busqué, Raquel; Gómez Gras, Giovanni (2016-05-01)
    Article
    Accés obert
    The aim of this paper is to analyze the performance of a RepRap 3D printer liquefier by studying its thermal behavior, focusing on the convective heat dissipation developed along the liquefier body during the 3D printing ...
  • Flow and heat transfer of impinging synthetic jets 

    Miró Jané, Arnau (Universitat Politècnica de Catalunya, 2019-06-19)
    Tesi
    Accés obert
    Synthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing fluid to enter and leave through a small orifice. This results in a net jet that is able to transfer kinetic energy and momentum ...
  • Heat loss prediction of a confined premixed jet flame using a conjugate heat transfer approach 

    Gövert, S.; Mira, Daniel; Zavala-Ake, M.; Kok, J.B.W.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2017-04)
    Article
    Accés obert
    The presented work addresses the investigation of the heat loss of a confined turbulent jet flame in a lab-scale combustor using a conjugate-heat transfer approach and large-eddy simulation. The analysis includes the ...
  • Heat Transfer Effects on a Fully Premixed Methane Impinging Flame 

    Mira, Daniel; Zavala, Miguel; Avila, Matías; Owen, Herbert; Cajas García, Juan Carlos; Vázquez, Mariano; Houzeaux, Guillaume (Springer, 2016-01-09)
    Article
    Accés obert
    A numerical assessment of different thermal conditions for an impinging flame configuration is investigated using large-eddy simulation. The cases of study correspond to a turbulent methane flame at equivalence ratio ER = ...
  • La Ecuación del calor 

    Caffarelli, Luis A. (2003-09-22)
    Audiovisual
    Accés obert
    Lliçó inaugural del curs 2003-2004 a càrrec del Dr. Caffarelli, professor de la Universitat de Texas.
  • Multi-level-objective design optimization of permanent magnet synchronous wind generator and solar photovoltaic system for an urban environment application 

    Asef, Pedram (Universitat Politècnica de Catalunya, 2019-01-31)
    Tesi
    Accés obert
    This Ph.D. thesis illustrates a novel study on the analytical and numerical design optimization of radial-flux permanent magnet synchronous wind generators (PMSGs) for small power generation in an urban area, in which an ...
  • Nonlinear model predictive control for thermal management in plug-in hybrid electric vehicles 

    López Sanz, Jorge; Ocampo-Martínez, Carlos; Álvarez Flórez, Jesús Andrés; Moreno Eguilaz, Juan Manuel; Ruiz Mansilla, Rafael (2017-05)
    Article
    Accés obert
    A nonlinear model predictive control (NMPC) for the thermal management (TM) of Plug-in Hybrid Electric Vehicles (PHEVs) is presented. TM in PHEVs is crucial to ensure good components performance and durability in all ...
  • Numerical study of heat transfer from a synthetic impinging jet with a detailed model of the actuator membrane 

    Miró, Arnau; Soria Guerrero, Manel; Cajas García, Juan Carlos; Rodríguez Pérez, Ivette María (2019-02-02)
    Article
    Accés restringit per política de l'editorial
    Synthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing the fluid to enter and leave through a small orifice. The present study is focused on investigating the cooling capabilities ...
  • Particulate immersed boundary method for complex fluid-particle interaction problems with heat transfer 

    Zhang, Hao; Yuan, Haizhuan; Trias Miquel, Francesc Xavier; Yu, Aibing; Tan, Yuanqiang; Oliva Llena, Asensio (2016-01-01)
    Article
    Accés obert
    In our recent work (Zhang et al., 2015), a Particulate Immersed Boundary Method (PIBM) for simulating fluid-particle multiphase flow was proposed and assessed in both two- and three-dimensional applications. In this study, ...
  • La totora como material de aislamiento térmico: propiedades y potencialidades 

    Aza Medina, Leyda Cinthia (Universitat Politècnica de Catalunya, 2016-05)
    Projecte Final de Màster Oficial
    Accés obert
    Una parte importante del impacto ambiental generado por las actividades humanas se debe a la extracción y uso de materiales para la construcción; frente a este problema existe la necesidad de desarrollar nuevas alternativas ...
  • Transient thermal modelling of substation connectors by means of dimensionality reduction 

    Abomailek Rubio, Basel Carlos; Capelli, Francesca; Riba Ruiz, Jordi-Roger; Casals Torrens, Pau (2017-01-25)
    Article
    Accés obert
    This paper proposes a simple, fast and accurate simulation approach based on one-dimensional reduction and the application of the finite difference method (FDM) to determine the temperatures rise in substation connectors. ...