Enviaments recents

• Fluid flow simulation and permeability computation in deformed porous carbonate grainstones 

  Zambrano, Miller; Tondi, Emanuele; Mancini, Lucia; Lanzafame, Gabriele; Trias Miquel, Francesc Xavier; Arzilli, Fabio; Materazzi, Fabio; Torrieri, Stefano (Elsevier, 2018-05-01)
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  Accés restringit per política de l'editorial

  In deformed porous carbonates, the architecture of the pore network may be modified by deformation or diagenetic processes altering the permeability with respect to the pristine rock. The effects of the pore texture and ...
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  DNS of falling droplets in a vertical channel 

  Balcázar, Nestor; Castro González, Jesús; Chiva Segura, Jorge; Oliva Llena, Asensio (WIT Press, 2018-02-01)
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  Accés obert

  This paper presents Direct Numerical Simulation (DNS) of the falling motion of single and multiple deformable drops in a vertical channel. A systematic study of the wall effect on the motion of single drop is performed for ...
• A new subgrid characteristic length for turbulence simulations on anisotropic grids 

  Trias Miquel, Francesc Xavier; Gorobets, Andrei; Silvis, Maurits; Verstappen, Roel; Oliva Llena, Asensio (2017-11-29)
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  Accés restringit per política de l'editorial

  Direct numerical simulations of the incompressible Navier-Stokes equations are not feasible yet for most practical turbulent flows. Therefore, dynamically less complex mathematical formulations are necessary for coarse-grained ...
• Regional aerosol deposition in the human airways: the SimInhale benchmark case and a critical assessment of in silico methods 

  Koullapis, P.; Kassinos, S.C.; Muela Castro, Jordi; Pérez Segarra, Carlos David; Rigola Serrano, Joaquim; Lehmkuhl, Oriol; Cui, Y.; Sommerfeld, M.; Elcner, J.; Jicha, M.; Saveljic, I.; Filipovic, N.; Lizal, F.; Nicolaou, L. (2017-09-07)
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  Accés restringit per política de l'editorial

  Regional deposition effects are important in the pulmonary delivery of drugs intended for the topical treatment of respiratory ailments. They also play a critical role in the systemic delivery of drugs with limited lung ...
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  Numerical study of an impulse wave generated by a sliding mass 

  Schillaci, Eugenio; Favre Samarra, Federico; Antepara Zambrano, Óscar; Balcazar, Nestor; Oliva Llena, Asensio (WIT Press, 2018)
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  Accés obert

  In this work, a numerical framework for the direct numerical simulation of tsunami waves generated by landslide events is proposed. The method, implemented on the TermoFluids numerical platform, adopts a free surface model ...
• Numerical study of Taylor bubbles rising in a stagnant liquid using a level-set/moving-mesh method 

  Gutiérrez González, Ernesto; Balcázar Arciniega, Néstor; Bartrons Casademont, Eduard; Rigola Serrano, Joaquim (2017-06-08)
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  Accés restringit per política de l'editorial

  An Arbitrary Lagrangian-Eulerian formulation has been posed to solve the challenging problem of the three-dimensional Taylor bubble, within a Conservative Level Set (CLS) framework. By employing a domain optimization method ...
• A 3-D volume-of-fluid advection method based on cell-vertex velocities for unstructured meshes 

  Jofre Cruanyes, Lluís; Lehmkuhl Barba, Oriol; Castro González, Jesús; Oliva Llena, Asensio (Elsevier, 2014-05-01)
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  Accés restringit per política de l'editorial

  A new geometrical Volume-of-Fluid (VOF) method for capturing interfaces on three-dimensional (3-D) Cartesian and unstructured meshes is introduced. The method reconstructs interfaces as first- and second-order piecewise ...
• A low-dissipation convection scheme for the stable discretization of turbulent interfacial flow 

  Schillaci, Eugenio; Jofre Cruanyes, Lluís; Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Oliva Llena, Asensio (Elsevier, 2017-08-10)
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  Accés restringit per política de l'editorial

  This paper analyzes a low-dissipation discretization for the resolution of immiscible, incompressible multiphase flow by means of interface-capturing schemes. The discretization is built on a three-dimensional, unstructured ...
• Large eddy simulation of a turbulent diffusion flame: some aspects of subgrid modelling consistency 

  Ventosa Molina, Jordi; Lehmkuhl, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2017-04-26)
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  Accés restringit per política de l'editorial

  In the context of Large Eddy Simulation (LES) solely for the momentum transport equation there may be found several models for the turbulent subgrid fluxes. Furthermore, among those relying on the eddy diffusivity approach, ...
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  DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5 

  Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2013-01-15)
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  Accés obert

  This work is devoted to the study of turbulent natural convection flows in differentially heated cavities. The adopted configuration corresponds to an airfilled (Pr = 0.7) cavity of aspect ratio 5 and Rayleigh number Ra ...
• Three dimensionality in the wake of the flow around a circular cylinder at Reynolds number 5000 

  Aljure Osorio, David E.; Lehmkuhl, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (Elsevier, 2017-04-02)
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  Accés restringit per política de l'editorial

  The turbulent flow around a circular cylinder has been investigated at Re=5000Re=5000 using direct numerical simulations. Low frequency behavior, vortex undulation, vortex splitting, vortex dislocations and three dimensional ...
• Heat and moisture insulation by means of air curtains: application to refrigerated chambers 

  Giráldez García, Héctor; Pérez Segarra, Carlos David; Oliet Casasayas, Carles; Oliva Llena, Asensio (Elsevier, 2016-08)
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  Accés restringit per política de l'editorial

  The present study is devoted to the determination of the efficiency of air curtain units (ACUs) applied to heat and moisture insulation of refrigerated chambers. A detailed study of the fluid dynamics and heat and mass ...

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