Exploració per tema "Two-phase flow"

Ara es mostren els items 33-52 de 53

    • Near-interface flow modeling in large-eddy simulation of two-phase turbulence 

      Jofre Cruanyes, Lluís; Dodd, Michael S.; Grau Barceló, Joan; Torres Cámara, Ricardo (2020-11-11)
      Article
      Accés obert
      The smallest hydrodynamic length scales in two-phase turbulence are located at the interface between phases, or fluids, as a result of two-way coupling phenomena. Typically, these interface-generated scales are several ...

    • Numerical and Experimental Study of the Squeezing-to-Dripping Transition in a T-Junction 

      Arias Calderón, Santiago; Villardi de Montlaur, Adeline de (2020-05-26)
      Article
      Accés obert
      In this work, we study the transition from squeezing to dripping during the formation of bubbles in a capillary T-junction in conditions relevant to microgravity. The junction is formed by two perpendicular cylinders of ...

    • Numerical modelling of two-phase flow in fractured rock masses using zero-thickness interface elements 

      Barandiarán Villegas, Lucía Belén; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Text en actes de congrés
      Accés obert
      In recent years, the authors and co-workers have developed a 3D finite element model for coupled thermo-hydro-mechanical (THM) problems in fractured rock masses. Zero-thickness interface elements are used for taking into ...

    • Numerical resolution in a PCM accumulator in cryogenic conditions 

      Morales Ruíz, Sergio; Rigola Serrano, Joaquim; Castro González, Jesús; Oliva Llena, Asensio (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A numerical study of the thermal and fluid-dynamic behaviour of the two-phase flow inside ducts working under cryogenic conditions, coupled with the analysis of a phase change material PCM accumulator is presented. The ...

    • Numerical resolution of the heat accumulator in a Low Cost Cryogenic Propulsion (LCCP) system 

      Morales Ruíz, Sergio; Castro González, Jesús; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2011)
      Comunicació de congrés
      Accés obert
      In this paper, a numerical study of a heat accumulator in the LCCP system has been carried out. The thermal and fluid-dynamic behaviour of the two-phase flow inside ducts working under cryogenic conditions as a propellant ...

    • Numerical Simulation of High-Density Ratio Bubble Motion with interIsoFoam 

      Siriano, Simone; Balcázar Arciniega, Néstor; Tassone, Alessandro; Rigola Serrano, Joaquim; Caruso, Gianfranco (Multidisciplinary Digital Publishing Institute (MDPI), 2022-05-01)
      Article
      Accés obert
      The breeding blanket is one of the fundamental components of a nuclear fusion reactor and is responsible for the fuel production, generating tritium through neutronic capture reaction between lithium and neutrons. Lithium ...

    • Numerical simulation of incompressible two phase flows by conservative level set method 

      Balcázar Arciniega, Néstor; Jofre Cruanyes, Lluís; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Castro González, Jesús (Budapest University of Technology and Economics, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A numerical formulation for the Conservative Level-Set Method of Olsson and Kreiss is implemented using the finite volume approach. Both convective term of the interface advection equation and compression term of the ...

    • Numerical simulation of non-adiabatic capillary tubes. Special emphasis on the near-saturation zone 

      Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Elsevier, 2015-04-15)
      Article
      Accés obert
      The aim of this article is to present a distributed numerical model that simulates the thermal and fluid-dynamic phenomena inside non-adiabatic capillary tubes. The resolution approach is based on a two-phase flow model ...

    • Numerical Study and Experimental Comparison of Two-Phase Flow Generation in a T-Junction 

      Arias Calderón, Santiago; Villardi de Montlaur, Adeline de (2017)
      Article
      Accés obert
      This paper presents a three-dimensional numerical study of the bubble generation process in a micro T-junction, performed with the commercial computational fluid dynamics solver ANSYS Fluent, version 15.0.7. Numerical ...

    • Numerical study with OpenFOAM of the bubble generation process in an inverse T-junction in microgravity conditions 

      Rosado Bailón, Gisela (Universitat Politècnica de Catalunya, 2019-07-16)
      Treball Final de Grau
      Accés obert
      Microgravity is the condition perceived in an object or body when gravity effect is negligible. This can mostly happen when the object is in a constant free fall state, which gives the false perception of Zero Gravity. It ...

    • On the development and application of intrusive sensors for two-phase flows characterization in complez environments 

      Monrós Andreu, Guillem; Prades, O.; Martínez Cuenca, Raúl; Torró Cueco, Salvador Francisco; Chiva Vicent, Sergio (SARTI, 2023)
      Article
      Accés obert
      Intrusive sensors are widely employed in numerous industrial applications to determine the phase fraction in gas-liquid two-phase flows. Such applications include those in the chemical, nuclear, and oil industries. This ...

    • Opposed bubbly jets at different impact angles: jet structure and bubble properties 

      Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2010-08)
      Article
      Accés restringit per política de l'editorial
      The structure of two colliding water jets containing small gas bubbles is studied experimentally. The effects of the separation distance between jets, as well as the orientation angle, on the spatial distribution of ...

    • Optimization-based level-set re-initialization: a robust interface preserving approach in multiphase problems 

      Hashemi, Alireza; Hashemi, Mohammad Reza; Ryzhakov, Pavel; Rossi, Riccardo (Elsevier, 2024-02)
      Article
      Accés obert
      In spite of its overall efficiency and robustness for capturing the interface in multiphase fluid dynamics simulations, the well-known shortcoming of the level-set method is associated with the lack of a systematic approach ...

    • Parallel Unstructured Conservative Level-Set (UCLS) method for two-phase flow with Marangoni effect 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Parallel Computational Fluid Dynamics (ParCFD), 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work presents a massively parallelized Unstructured Conservative Level-Set (UCLS) method for two-phase flow with variable surface tension, i.e., Marangoni effect. This method employs a multiple-marker UCLS approach ...

    • Simulation numérique du dispositif microfluidique bille d'un stylo 

      Badreddine, Bourtal (Universitat Politècnica de Catalunya, 2008-06)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      La simulation numérique tend à prendre de plus en plus d’importance dans le développement des projets scientifiques actuels. Les simulations numériques ont l’avantage, par rapport aux expérimentations, d’être moins ...

    • Thermal Systems Oriented Two-Phase Heat Exchanger Models. Focus on Numerical Robustness 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (Purdue University, 2022)
      Comunicació de congrés
      Accés obert
      The simulation of complex refrigeration architectures (that usually include vapor compression cycles) provides useful information for design, study and optimization purposes. Such arrangements may include several interconnected ...

    • Three dimensional modeling of liquid droplet spreading on solid surface: an enriched finite element/level-set approach 

      Hashemi, Mohammad Reza; Ryzhakov, Pavel; Rossi, Riccardo (2021-10)
      Article
      Accés obert
      A physically consistent approach is introduced to simulate dynamics of droplets in contact with solid substrates. The numerical method is developed by introducing the molecular–kinetic model within the framework of the ...

    • Two-phase turbulent kinetic energy budget computation in co-current Taylor bubble flow 

      Frederix, E.M.A.; Tajfirooz, S; Hopman, Johannes Arend; Fang, Jun; Merzari, Elia; Komen, E.M.J. (Taylor & Francis Group, 2023-02-13)
      Article
      Accés obert
      Simulation of two-phase flows is relevant for reactor design and safety at normal operation or during accident scenarios. Often, the two-phase flow is in a regime in which slugs are formed or where the flow stratifies. ...

    • Unstructured Conservative Level-Set (UCLS) method for mass transfer in bubble swarms with high physical properties ratios 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Begell House, 2024)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work introduces a parallel Unstructured Conservative Level-Set (UCLS) method for reactive mass transfer in two-phase flows with a high-density ratio. The proposed method employs the multiple-marker approach to circumvent ...

    • Unstructured Level-Set Method For Saturated Liquid-Vapor Phase Change 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Text en actes de congrés
      Accés obert
      A novel conservative level-set method for saturated liquid-vapor phase change on unstruc-tured meshes is introduced. Transport equations are discretized by the finite-volume method on col-located unstructured grids. Mass ...