Now showing items 1-20 of 99

    • A conserved phase-field system based on the Maxwell–Cattaneo law 

      Miranville, Alain; Quintanilla de Latorre, Ramón (2013-06-01)
      Article
      Restricted access - publisher's policy
      Our aim in this paper is to study a generalization of the conserved Caginalp phasefield system based on the Maxwell–Cattaneo law for heat conduction and endowed with Neumann boundary conditions. In particular, we obtain ...
    • A level-set method for interfacial heat or mass transfer in two-phase flows 

      Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
      Conference lecture
      Restricted access - publisher's policy
      A level-set model is proposed for simulating interfacial heat or mass transfer in two-phase flows. The Navier-Stokes equations as well as the heat transfer or mass transfer equations are discretized using a finite-volume ...
    • 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
      Restricted access - publisher's policy
      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 suitable criterion for tube sizing in reverse cycle machines 

      Rivero Vilà, Oriol del (Universitat Politècnica de Catalunya / Université de Lorraine, 2011)
      Master thesis (pre-Bologna period)
      Open Access
      To find the optimal diameters for the connecting tubes in reverse cycle machines we use in this paper a new criterion that we have recently developed, the Ecological Cost, “EC" (Kheiri et al. 2011) EC includes the environmental ...
    • Advanced study for the numerical approximation of Navier-Stokes equations by implementation of a finite volume solver 

      Schubert, Stefan (Universitat Politècnica de Catalunya, 2019-10)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Rheinisch-Westfälische Technische Hochschule Aachen
      The objective of the thesis is to build different fluid solvers from scratch, whereby the following three cases are considered: Resolution of diffusion problems, convection-diffusion and Navier-Stokes equations. In the ...
    • An immersed boundary method to conjugate heat transfer problems in complex geometries. Application to an automotive antenna 

      Favre, F.; Antepara Zambrano, Óscar; Oliet Casasayas, Carles; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2019-02-05)
      Article
      Restricted access - publisher's policy
      Considering that the most common reason for electronic component failure is the excessive temperature level, an efficient thermal management design can prolong the operating life of the equipment, while also increasing its ...
    • Analysis and simulation of a thermosolar heating system using phase change material as the flowing fluid 

      Utrilla Duaso, Javier (Universitat Politècnica de Catalunya / Politecnico di Torino, 2011)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      The increasing gas emissions and the continuous rise of fuel prices are the main reasons why new solutions for world energy demand are searched. Using Europe as an indicator, every year more than thirty per cent of the oil ...
    • Analysis of energy exchange in system with varyng materials and conditions 

      Cirer Pallarès, Joan (Universitat Politècnica de Catalunya, 2019-10-31)
      Master thesis
      Open Access
      Covenantee:   Vysoké učení technické v Brně
      Experimental work on a fully equipped pilot-plant operating absorber fluid scrubbler. The student will participate in current live research regarding the separation of gaseous pollutants from the air.
    • Analysis of heat transfer and fluid flow in thermal equipment 

      Zhang, Lei (Universitat Politècnica de Catalunya, 2019-10-09)
      Master thesis
      Open Access
      Heat transfer and flow fluid in thermal equipment is a concerned and basic topic in thermal area. The main objective of this thesis is tocultivate basic skills of analyzing athermal problemand selecting an appropriate ...
    • Analysis of the Applicability of Non-Destructive Techniques to Determine In Situ Thermal Transmittance in Passive House Façades 

      Tejedor Herrán, Blanca; Gaspar Fàbregas, Kàtia; Casals Casanova, Miquel; Gangolells Solanellas, Marta (Multidisciplinary Digital Publishing Institute, 2020-12-01)
      Article
      Open Access
      Within the European framework, the passive house has become an essential constructive solution in terms of building efficiency and CO2 reduction. However, the main approaches have been focused on post-occupancy surveys, ...
    • Analysis of the geometric and radiative characteristics of hydrocarbon pool-fires 

      Planas Cuchi, Eulàlia; Casal Fàbrega, Joaquim; Arnaldos Viger, Josep; Muñoz, Miguel Ángel (2004-08-01)
      Article
      Restricted access - publisher's policy
      The radiation intensity at a given distance depends mainly on the radiative power and the flame’s size and shape. Considerable literature describing both experimental and theoretical studies of thermal radiation from ...
    • Aplicación de los métodos numéricos basados en volúmenes finitos para la resolución de problemas de mecánica de fluidos y sólidos termoelásticos 

      González Acedo, Ignacio (Universitat Politècnica de Catalunya, 2013-10)
      Master thesis (pre-Bologna period)
      Open Access
      Este proyecto representa una introducción al análisis numérico computacional para resolver problemas dinámicos con transferencia de calor en medios continuos. El objetivo es, en primer lugar, implementar un código orientado ...
    • Automated data-processing technique: 2D Map for identifying the distribution of the U-value in building elements by quantitative internal thermography 

      Tejedor Herrán, Blanca; Barreira, Eva; Almeida, Ricardo M. S. F.; Casals Casanova, Miquel (2021-02)
      Article
      Restricted access - publisher's policy
      Computing a 2D colour map of average U-values pixel-by-pixel could become a challenging task in terms of complexity and time, especially for entire façades under the influence of anomalies. In a quantitative IRT test, a ...
    • Caracterització i simulació CFD-1D del procés d'evaporació en dipòsits de transport Heavy-Duty 

      Padullés Domínguez, Roger (Universitat Politècnica de Catalunya, 2018-06-28)
      Bachelor thesis
      Restricted access - author's decision
      L’objectiu d’aquest treball és estudiar i caracteritzar el comportament del Gas Natural Liquat a l’interior del dipòsit de combustible d’un camió de transport Heavy-Duty quan aquest està estacionat. Quan el camió està ...
    • Combined heat and moisture transfer in buildings systems 

      Damle, Rashmin; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2012)
      Conference report
      Restricted access - publisher's policy
      Temperature and humidity are the two main parameters indicating the comfort level of the building occupants. Although the effect of temperature is taken into account in thermal simulation of buildings, the moisture transfer ...
    • 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 ...
    • Comparison of thermal performance of 3D printer liquefiers through finite element models 

      Jerez Mesa, Ramón; Travieso Rodriguez, Jose Antonio; Gómez Gras, Giovanni; Llumà Fuentes, Jordi; Traver Ramos, Oriol (2016)
      Conference report
      Open Access
      Open source 3D printers have experienced an intense expansion during the last years, mainly because of their accessibility and the vast availability of information thanks to user communities. This fact presents researchers ...
    • Concentrated solar in a fluidized bed 

      Terme Turmo, Alex (Universitat Politècnica de Catalunya, 2017-09)
      Master thesis
      Open Access
      The aim of this thesis is to create a CFD model of a fluidized bed to study the heat transfer having concentrated solar as a heat source. First, some background about concentrated solar energy, a review of its actual ...
    • Construction and optimization of a device for enhanced cooling 

      Reguera Robledo, José Ángel (Universitat Politècnica de Catalunya / Technishe Universität Darmstadt, 2009)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      The development of faster processors for computer is depending at the moment on optimizing the heat removal. This is the motivation for the Center of Smart Interfaces to do research in this field. Cooling, using two phase ...