Exploració per tema "Heat--Transmission"

Ara es mostren els items 1-20 de 49

    • A level-set model for thermocapillary motion of deformable fluid particles 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Castro González, Jesús; Oliva Llena, Asensio (2016-12-01)
      Article
      Accés obert
      A new level-set model is proposed for simulating immiscible thermocapillary flows with variable fluid-property ratios at dynamically deformable interfaces. The Navier–Stokes equations coupled with the energy conservation ...

    • A parallel finite-element framework for the thermal analysis of metal additive manufacturing with powder methods 

      Miranda Neiva, Eric (Universitat Politècnica de Catalunya, 2016-10-21)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Virtual design process and validation of products built with metal additive manufacturing technologies with powder methods is not possible without a coupled thermomechanical numerical analysis tool that is capable of ...

    • An introduction to parallel in time discretization of transport equations 

      Coronel Varillas, Solange (Universitat Politècnica de Catalunya, 2021-07)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      Realitzat a/amb:   Barcelona Supercomputing Center
      Parallel in time integration methods is an interesting field of study, because of its new direction over parallelize. That is, when parallelization in space becomes saturated, the time direction becomes a new way in which ...

    • Analysis of CO2 Power Cycle Heat Exchangers 

      Chacko Thomas, Jeffin (Universitat Politècnica de Catalunya, 2022-05-18)
      Projecte Final de Màster Oficial
      Accés obert
      The CO2 power cycle has gained attention as an alternative to the classical Rankine and Brayton cycles during this transition to sustainable energy production from the current available methods that have a prime share of ...

    • Combined heat and moisture transfer in buildings systems 

      Damle, Rashmin; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 a size-dependent model for the latent heat of small tin nanoparticles 

      González Esteve, Adrià (Universitat Politècnica de Catalunya, 2016-07)
      Projecte Final de Màster Oficial
      Accés obert
      The classical formulation for the Stefan problem at the nanoscale does not work because the melting temperature and the effective latent heat decrease with the nanoparticle size. In this work, a model for the effective ...

    • Comparison of thermal performance of 3D printer liquefiers through finite element models 

      Jerez Mesa, Ramón; Travieso Rodríguez, José Antonio; Gómez Gras, Giovanni; Llumà Fuentes, Jordi; Traver Ramos, Oriol (2016)
      Text en actes de congrés
      Accés obert
      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 ...

    • 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 ...

    • Concentrated solar in a fluidized bed 

      Terme Turmo, Alex (Universitat Politècnica de Catalunya, 2017-09)
      Projecte Final de Màster Oficial
      Accés obert
      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 ...

    • Convective heat transfer around vertical jet fires: an experimental study 

      Kozanoglu, Bulent Kozanoglu; Zárate López, Luis; Gómez-Mares, Mercedes; Casal Fàbrega, Joaquim (Elsevier, 2011-12)
      Article
      Accés restringit per política de l'editorial
      The convection heat transfer phenomenon in vertical jet fires was experimentally analyzed. In these experiments, turbulent propane flames were generated in subsonic as well as sonic regimes. The experimental data demonstrated ...

    • Coupling CFD models of airflow with building simulation with an object-oriented and parallel infrastructure 

      Damle, Rashmin; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Integrating CFD & HT models with the general building program raises the computational time of building simulations as these simulations are usually performed over a period of one year. Within this context, our aim is ...

    • Design of microdistillation device 

      Capdevila Cullerés, Jaume (Universitat Politècnica de Catalunya, 2017-09)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Technische Universität Darmstadt
      During the last decades, scientists had been widely attracted for microchemical processing technology, due to its efficient mass and energy transfer as well as the increased safety they provide. Microstructured devices ...

    • Detailed analysis of the numerical resolution of the heat transfer and fluid flow governing equations 

      Illa José, Arnau (Universitat Politècnica de Catalunya, 2019-09-30)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Primerament es proposen a l’estudiant uns casos bàsics d’integració de les equacions bàsiques de conservació de la massa, momentum i energia que li serviran per consolidar els seus coneixements en aquesta important temàtica ...

    • Direct numerical simulation of the turbulent natural convection flow in an open cavity of aspect ratio 4 

      Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (Begell House, 2012)
      Text en actes de congrés
      Accés obert
      In this paper, three-dimensional turbulent natural convection heat transfer in an open cavity with an isothermal wall facing the overture has been studied. The aspect ratio chosen for the cavity has been 4 to complement the ...

    • DNS and RANS simulations of a coil heat exchanger immersed in a tank 

      Vera i Fernández, Jordi; Torras Ortiz, Santiago; Schillaci, Eugenio; Oliva Llena, Asensio (Begell House, 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The operation of heat exchangers in a thermal system can be described by simple heat transfer equations. The heat exchange is normally defined by a global heat transfer coefficient, which takes into account internal and ...

    • Estudi experimental i numèric d'un bescanviador de calor 

      Riera Santacreu, Martí (Universitat Politècnica de Catalunya, 2017-01-10)
      Treball Final de Grau
      Accés obert
      El treball present tracta sobre la realització d'un estudi experimental i numèric del bescanviador de flux creuat que disposa el departament de Mecànica de Fluids de l'EEBE. S'ha dut a terme una primera part experimental ...

    • Estudio de fenómenos de transferencia de calor y dinámica de fluidos mediante los métodos de Lattice Boltzmann y volúmenes finitos 

      Sargsyan, Tigran (Universitat Politècnica de Catalunya, 2012-09)
      Projecte/Treball Final de Carrera
      Accés obert
      El trabajo se divide en tres partes fundamentales. En la primera parte (capítulo 1) se tratan las ecuaciones que rigen la dinámica de fluidos, que son las de Navier- Stokes. Se presentan las adimensionalizaciones de las ...

    • Experimental study of heat transport in fractured network 

      Pastore, Nicola; Cherubini, claudia; Gassi, C.I.; Allegretti, N.M.; Redondo Apraiz, José Manuel; Tarquis Alfonso, Ana Maria (2015-07-01)
      Article
      Accés obert
      Fractured rocks play an important role in transport of natural resources through subsurface systems. In recent years, interest has grown in investigating heat transport by means of tracer tests, driven by the important ...

    • Far-field radiative thermal rectification based on asymmetric emissivity 

      Ng, Ryan C.; El Sachat, Alexandros; Jaramillo Fernández, Juliana; Sotomayor Torres, Clivia M.; Chavez Angel, Emigdio (American Chemical Society (ACS), 2023-09-29)
      Article
      Accés obert
      This experimental study investigates thermal rectification via asymmetric far-field thermal radiation on a fused silica slab. An asymmetrical distribution of surface emissivity is created over the device by partially ...

    • Film melting heat transfer from a horizontal open surface 

      Arias Montenegro, Francisco Javier (2019-05-26)
      Report de recerca
      Accés obert
      In this internal report, consideration is given to the velocity of melting from a horizontal open surface and with particular reference to polar caps and large glaciers. In current models, the melting velocity is critically ...