Recent Submissions

• A second-order time accurate semi-implicit method for fluid–structure interaction problems 

  Naseri, Alireza; González Acedo, Ignacio; Amani, Ahmad; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2019-04-01)
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  This paper is concerned with numerical solution of fluid-structure inter-action (FSI) problems involving an incompressible viscous flow and an elasticstructure. A semi-implicit partitioned method with second-order ...
• Numerical study of binary droplets collision in the main collision regimes 

  Amani, Ahmad; Balcázar Arciniega, Néstor; Gutiérrez Álvarez, Enrique; Oliva Llena, Asensio (2019-08-15)
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  Direct numerical simulation of binary droplets collision is done using a conservative level-set method. The Navier-Stokes and level-set equations are solved using a finite-volume method on collocated grids. A novel lamella ...
• Numerical study of rising bubbles with path instability using conservative level-set and adaptive mesh refinement 

  Antepara Zambrano, Óscar; Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Elsevier, 2019-06-15)
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  This paper focuses on three-dimensional direct numerical simulations of rising bubbles in the wobbling regime, and the study of its dynamical behavior for Eötvös number 1  ≤  Eo  ≤  10 and Morton number 1e−11  ≤ M ≤  1e−9. ...
• Numerical and experimental study of absorption of H2O vapor in wavy falling film of LiBr aqueous solution in vertical tubes and in presence of non-absorbables 

  García Rivera, Eduardo; Castro González, Jesús; Farnós Baulenas, Joan; Oliet Casasayas, Carles (Elsevier, 2019-04-01)
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  One of the main reasons for the discrepancies between theoretical predictions of absorption phenomena made by mathematical models when they are compared against experimental results under real conditions, are the presence ...
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  On the solution of the problem of a drop falling against a plane by using a level set-moving mesh-immersed boundary method 

  Gutiérrez, Enrique; Favre, F.; Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim (WIT Press, 2018)
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  Open Access

  A coupled Conservative Level Set – Moving Mesh – Immersed Boundary method is formulated and validated against the three-dimensional gravity-driven falling drop problem. First, by employing Conservative Level-Set (CLS) ...
• Numerical approach to study bubbles and drops evolving through complex geometries by using a level set – Moving mesh – Immersed boundary method 

  Gutiérrez González, Ernesto; Favre, F.; Balcázar Arciniega, Néstor; Amani, Ahmad; Rigola Serrano, Joaquim (2018-10-01)
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  The present work proposes a method to study problems of drops and bubbles evolving in complex geometries. First, a conservative level set (CLS) method is enforced to handle the multiphase domain while keeping the mass ...
• Direct numerical simulation of backward-facing step flow at Ret = 395 and expansion ratio 2 

  Pont Vilchez, Arnau; Trias Miquel, Francesc Xavier; Gorobets, Andrey; Oliva Llena, Asensio (2019-03-25)
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  Backward-facing step (BFS) constitutes a canonical configuration to study wallbounded flows subject to massive expansions produced by abrupt changes in geometry. Recirculation flow regions are common in this type of flow, ...
• An immersed boundary method to conjugate heat transfer problems in complex geometries. Application to an automotive antenna 

  Favre, F.; Antepara Zambrano, Óscar; Oliet Casasayas, Carles; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2019-02-05)
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  Considering that the most common reason for electronic component failure is the excessive temperature level, an efficient thermal management design can prolong the operating life of the equipment, while also increasing its ...
• Fixed grid numerical modelling of frost growth and densification 

  Bartrons Casademont, Eduard; Galione, Pedro; Pérez Segarra, Carlos David (2019-03)
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  A fixed-grid-porous-media method capable of simulating the growth and densification of frost sheets is here presented. A velocity field is calculated across the entire domain, in which a porous media treatment is given to ...
• Multiphysics modeling and experimental validation of low temperature accumulator for cryogenic space propulsion systems 

  Torras Ortiz, Santiago; Castro González, Jesús; Rigola Serrano, Joaquim; Morales Ruíz, Sergio; Riccius, Jorg; Leiner, Johannes (2019-01-01)
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  Within the framework of Low Thrust Cryogenic Propulsion (LTCP) systems, a low-temperature accumulator acting as thermal energy storage tank is an interesting option for cyclical processes under intermittent firings avoiding ...
• Spectrally-Consistent Regularization of Navier–Stokes Equations 

  Trias Miquel, Francesc Xavier; Folch Flórez, David; Gorobets, A.; Oliva Llena, Asensio (2019-05)
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  The incompressible Navier–Stokes equations form an excellent mathematical model for turbulent flows. However, direct simulations at high Reynolds numbers are not feasible because the convective term produces far too many ...
• Flow over a realistic car model: wall modeled large eddy simulations assessment and unsteady effects 

  Aljure Osorio, David E.; Calafell Sandiumenge, Joan; Baez Vidal, Aleix; Oliva Llena, Asensio (2018-03-01)
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  Numerical simulations are carried out on the flow over a realistic generic car geometry, the DrivAer-fastback car model. Pure large eddy simulations (LES) and wall-modeled large eddy simulations (WMLES) are used and compared ...

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