Recent Submissions

• On a Proper Tensor-Diffusivity Model for Large-Eddy Simulation of Buoyancy-Driven Turbulence 

  Trias Miquel, Francesc Xavier; Dabbagh, Firas; Gorobets, Andrei; Oliet Casasayas, Carles (Springer, 2020-03-26)
  Article
  Restricted access - publisher's policy

  In this work, we aim to shed light to the following research question: can we find a nonlinear tensorial subgrid-scale (SGS) heat flux model with good physical and numerical properties, such that we can obtain satisfactory ...
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  Flow topology dynamics in a three-dimensional phase space for turbulent Rayleigh-Bénard convection 

  Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrey; Oliva Llena, Asensio (2020-02-28)
  Article
  Open Access
• Eigensensitivity analysis of subgrid-scale stresses in large-eddy simulation of a turbulent axisymmetric jet 

  Jofre Cruanyes, Lluís (2019)
  Article
  Restricted access - publisher's policy

  The study of complex turbulent flows by means of large-eddy simulation approaches has become increasingly popular in many scientific and engineering applications. The underlying filtering operation of the approach enables ...
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  A framework for characterizing structural uncertainty in large-eddy simulation closures 

  Jofre Cruanyes, Lluís (springer-Verlag, 2018)
  Article
  Open Access

  Motivated by the sizable increase of available computing resources, large-eddy simulation of complex turbulent flow is becoming increasingly popular. The underlying filtering operation of this approach enables to represent ...
• A numerical approach for non-Newtonian two-phase flows using a conservative level-set method 

  Amani, Ahmad; Balcázar Arciniega, Néstor; Naseri, Alireza; Rigola Serrano, Joaquim (2020-04-01)
  Article
  Restricted access - publisher's policy

  A finite-volume based conservative level-set method is presented to numerically solve the non-Newtonian multiphase flow problems. One set of governing equations is written for the whole domain, and different phases are ...
• Numerical study of droplet deformation in shear flow using a conservative level-set method 

  Amani, Ahmad; Balcázar Arciniega, Néstor; Castro González, Jesús; Oliva Llena, Asensio (2019-11-02)
  Article
  Restricted access - publisher's policy

  This paper is concerned with a numerical study on the behavior of a single Newtonian droplet suspended in another Newtonian fluid, all subjected to a simple shear flow. Conservative finite-volume approximation on a collocated ...
• An energy-preserving level set method for multiphase flows 

  Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús (2020-01-01)
  Article
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  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 ...
• A dynamic load balancing method for the evaluation of chemical reaction rates in parallel combustion simulations 

  Muela Castro, Jordi; Borrell Pol, Ricard; Ventosa Molina, Jordi; Jofre Roca, Lluís; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (Elsevier, 2019-08-15)
  Article
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  The development and assessment of an efficient parallelization method for the evaluation of reaction rates in combustion simulations is presented. Combustion simulations where the finite-rate chemistry model is employed ...
• Thermal and fluid dynamic analysis of Direct Steam Generation Parabolic Trough Collectors 

  Ferchichi, Souha; Kessentini, Hamdi; Morales Ruíz, Sergio; Rigola Serrano, Joaquim; Bouden, Chiheb; Oliva Llena, Asensio (Elsevier, 2019-09-15)
  Article
  Restricted access - publisher's policy

  Direct Steam Generation (DSG) has attracted considerable attention in comparison with conventional technologies based on Heat Transfer Fluids (HTF) for electricity generation due to its higher temperatures. In this context, ...
• 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 ...
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  Experimental investigation of inlet distortion effect on performance of a micro gas turbine 

  Naseri, Alireza; Sammak, Shervin; Boroomand, Masoud; Alihosseini, Alireza; Tousi, Abolghasem M. (2018-09-01)
  Article
  Open Access

  An experimental study has been carried out to determine how inlet total-pressure distortion affects the performance of a micro gas turbine. An inlet simulator is designed and developed to produce and measure distortion ...
• A time-average filtering technique to improve the efficiency of two-layer wall models for large eddy simulation in complex geometries 

  Calafell Sandiumenge, Joan; Trias Miquel, Francesc Xavier; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Elsevier, 2019-06-30)
  Article
  Restricted access - publisher's policy

  Two-Layer wall models have been recurrently studied since they represent a good physical model for Large Eddy Simulations with underresolved wall regions. Specifically, those based on the Reynolds Averaged Navier-Stokes ...

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