Now showing items 1-20 of 36

    • 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
      Open Access
      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
      Open Access
      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 ...
    • A short survey for a thermo-ducted kitchen hood wasted heat self-powered 

      Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (ASME International, 2022-08-17)
      Article
      Open Access
      In this note, a brief survey is given to the possibility for a thermo-ducted kitchen hood where exhaust fan or other mechanical devices are no longer needed, and then, in addition, no sound is generated. The aim of this ...
    • CFD studies and experimental validation of the convective heat transfer coefficients in non fully developed flows. Application to conventional geometries used in particles accelerators 

      Rabasa Galan, Mariona (Universitat Politècnica de Catalunya, 2023-01)
      Bachelor thesis
      Open Access
      Covenantee:   Sincrotró ALBA
      En el camp de l'enginyeria d'acceleradors de partícules, el disseny dels conductes de refrigeració dels seus components s'ha basat àmpliament en correlacions experimentals per al càlcul dels coeficients de transferència ...
    • Comparison of drop evaporation models on hot surface 

      González Esteve, Adrià (Universitat Politècnica de Catalunya / Politecnico di Milano, 2014)
      Bachelor thesis
      Open Access
      Covenantee:   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
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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
      Open Access
      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)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      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)
      Other
      Open Access
      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 ...
    • Electrochemically-assisted thermal-based technologies for soil remediation 

      Lanzalaco, Sonia; Sirés Sadornil, Ignasi (2021)
      Part of book or chapter of book
      Restricted access - publisher's policy
      In situ thermal remediation (ISTR) technologies are considered a good option to both, evaporate volatile organic contaminants (VOCs) and enhance the mass transport of dissolved chemicals, avoiding the drawbacks associated ...
    • Evaluating the freeze–thaw phenomenon in sandwich-structured composites via numerical simulations and infrared thermography 

      Sfarra, Stefano; Tejedor Herrán, Blanca; Perilli, Stefano; Almeida, Ricardo M. S. F.; Barreira, Eva (Springer, 2020-07-13)
      Article
      Open Access
      The water ingress phenomenon in sandwich-structured composites used in the aerospace/aeronautical sector is a current issue. This type of defect can cause in the course of time several other defects at the boundary, such ...
    • Experimental assessment of an analytical model of the convective heat transfer coefficient in a mine gallery 

      Felipe Blanch, José Juan de; Vives i Costa, Jordi; Niubó Eslava, Maria; Sanmiquel Pera, Lluís (Springer Nature, 2022-04-07)
      Article
      Open Access
    • Fachadas disipadoras de calor: recursos para el diseño arquitectonico 

      Hernández Morel, Gabriela de los Milagros (Universitat Politècnica de Catalunya, 2016-01)
      Master thesis
      Open Access
      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 Rodríguez, José Antonio; Corbella, Xavier; Busqué, Raquel; Gómez Gras, Giovanni (2016-05-01)
      Article
      Open Access
      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)
      Doctoral thesis
      Open Access
      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 ...
    • Flow regime analysis of high-pressure transcritical fluids in microducts 

      Bandarrinha Monteiro, Carlos Alexandre; Jofre Cruanyes, Lluís (2024-06)
      Article
      Open Access
      Microduct flows are known for their inherent laminar regimes resulting from the characteristic small dimensions and low velocities. In this regard, direct numerical simulations are employed to investigate an innovative ...
    • Fluid dynamics and heat transfer in the wake of a sphere 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2019-04)
      Article
      Open Access
      Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
    • Heat loss prediction of a confined premixed jet flame using a conjugate heat transfer approach 

      Gövert, S.; Mira Martínez, Daniel; Zavala-Ake, M.; Kok, J.B.W.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2017-04)
      Article
      Open Access
      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 Martínez, Daniel; Zavala, Miguel; Avila, Matías; Owen, Herbert; Cajas García, Juan Carlos; Vázquez, Mariano; Houzeaux, Guillaume (Springer, 2016-01-09)
      Article
      Open Access
      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 = ...