Now showing items 1-10 of 10

    • A Projected Ghost Fluid Method for a mimetic approach for extreme contrast interfaces in multiphase flows 

      Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús; Oliva Llena, Asensio (2018)
      Conference report
      Restricted access - publisher's policy
      In the context of a multimaterial domain, the GFM for the Laplacian operator is reformulated from an algebraic perspective, where operators are represented by matrices. From this perspective, a whole new level of analysis ...
    • Algebraic implementation of a flux limiter for heterogeneous computing 

      Valle Marchante, Nicolás; Álvarez Farré, Xavier; Trias Miquel, Francesc Xavier; Castro González, Jesús; Oliva Llena, Asensio (2018)
      Conference report
      Restricted access - publisher's policy
    • An energy-preserving level set method for multiphase flows 

      Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús (2020-01-01)
      Article
      Open Access
      The computation of multiphase flows presents a subtle energetic equilibrium between potential (i.e., surface) and kinetic energies. The use of traditional interface-capturing schemes provides no control over such a dynamic ...
    • Energy preserving multiphase flows: applications to falling films 

      Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús (2021)
      Conference report
      Open Access
      The numerical simulation of multiphase flows presents several challenges, namely the transport of different phases within de domain and the inclusion of capillary effects. Here, these are approached by enforcing a discrete ...
    • Implementation of a flux-limiter into a fully-portable, algebra-based framework for heterogeneous computing 

      Álvarez Farré, Xavier; Valle Marchante, Nicolás; Gorobets, Andrei; Trias Miquel, Francesc Xavier (2018)
      Conference report
      Restricted access - publisher's policy
      During the last years, there has been a signi¿cant increment in the variety of hardware to overcome the power constraint in the context of the exascale challenge. This progress is leading to an increasing hybridisation of ...
    • On the development of direct numerical simulations for falling films 

      Valle Marchante, Nicolás (Universitat Politècnica de Catalunya, 2021-01-07)
      Doctoral thesis
      Open Access
      Multiphase flows present a rich variety of physical instabilities, which may turn into a set of interesting techonological features. In the particular case of vertical fallings films, these features provide with short ...
    • On the implementation of flux limiters in algebraic frameworks 

      Valle Marchante, Nicolás; Álvarez Farré, Xavier; Gorobets, Andrei; Castro González, Jesús; Oliva Llena, Asensio; Trias Miquel, Francesc Xavier (2022-02-01)
      Article
      Open Access
      The use of flux limiters is widespread within the scientific computing community to capture shock dis- continuities and are of paramount importance for the temporal integration of high-speed aerodynamics, multiphase flows ...
    • On the Interpolation Problem for the Poisson Equation on Collocated Meshes 

      Santos Serrano, Daniel; Muela Castro, Jordi; Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Conference report
      Open Access
      The appearence of unphysical velocities in highly distorted meshes is a common problem in many simulations. In collocated meshes, this problem arises from the interpolation of the pressure gradient from faces to cells. ...
    • Symmetry-preserving discretization of Navier-Stokes on unstructured grids: collocated vs staggered 

      Trias Miquel, Francesc Xavier; Valle Marchante, Nicolás; Gorobets, Andrei; Oliva Llena, Asensio (2021)
      Conference report
      Open Access
      The essence of turbulence are the smallest scales of motion. They result from a subtle balance between convective transport and diffusive dissipation. Mathematically, these terms are governed by two differential operators ...
    • Symmetry-Preserving Discretizations In Unstructured Staggered Meshes 

      Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Verstappen, R.W.C.P. (2021)
      Conference report
      Restricted access - publisher's policy
      The adoption of symmetry-preserving discretizations is presented in terms of the collocated, unstructured meshes customary of commercial codes. By adopting an algebraic approach, a discretization of the convective terms ...