Recent Submissions

  • The benefits of very low earth orbit for earth observation missions 

    Crisp, Nicholas H.; Roberts, Peter C.E; Livadiotti, Sabrina; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-08)
    Article
    Restricted access - publisher's policy
    Very low Earth orbits (VLEO), typically classified as orbits below approximately 450 km in altitude, have the potential to provide significant benefits to spacecraft over those that operate in higher altitude orbits. This ...
  • RF Helicon-based Inductive Plasma Thruster (IPT) Design for an Atmosphere-Breathing Electric Propulsion System (ABEP) 

    Romano, Francesco; Chan, Y. A.; Herdrich, Georg; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-11)
    Article
    Restricted access - publisher's policy
    Challenging space missions include those at very low altitudes, where the atmosphere is source of aerodynamicdrag on the spacecraft. To extend such missions lifetime, an efficient propulsion system is required. Onesolution ...
  • Attitude control for satellites flying in VLEO using aerodynamic surfaces 

    Cañas Muñoz, Valentin; González, David; Becedas, Jonathan; Rodríguez Donaire, Silvia; García-Almiñana, Daniel; Sureda Anfres, Miquel; Nieto, Miriam; Muñoz, Candia (British Interplanetary Society, 2020)
    Article
    Restricted access - publisher's policy
    This paper analyses the use of aerodynamic control surfaces, whether passive or active, in order to carry out very low Earth orbit (VLEO) attitude maneuver operations. Flying a satellite in a very low Earth orbit with an ...
  • Effect of using external vertical fins in phase change material modules for domestic hot water tanks 

    Castell, Albert; Solé Cutrona, Cristian; Medrano, Marc; Roca Enrich, Joan; García-Almiñana, Daniel; Cabeza Fabra, Luisa Fernanda (2006-04)
    Article
    Open Access
    The effect of using external vertical fins in Phase Change Materials (PCM) modules to improve the natural convection coefficient in water is studied in this paper. The use of PCM in a water tank working with a solar system ...
  • XO-7 b: A Transiting Hot Jupiter with a Massive Companion on a Wide Orbit 

    Crouzet, Nicholas Michael; Healy, Bryan; Hebrard, Guillaume; García Melendo, Enrique José (2020-02-01)
    Article
    Restricted access - publisher's policy
    Transiting planets orbiting bright stars are the most favorable targets for follow-up and characterization. We report the discovery of the transiting hot Jupiter XO-7 b and of a second, massive companion on a wide orbit ...
  • Fluid dynamics and heat transfer in the wake of a sphere 

    Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2019-04)
    Article
    Restricted access - publisher's policy
    Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
  • Active flow control for external aerodynamics: from micro air vehicles to a full aircraft in stall 

    Lehmkuhl, Oriol; Lozano-Durán, Adrian; Rodríguez Pérez, Ivette María (Institute of Physics (IOP), 2020-04-01)
    Article
    Open Access
    We investigate the aerodynamic performance of active flow control of airfoils and wings using synthetic jets with zero net-mass flow. The study is conducted via wall-resolved and wall-modeled large-eddy simulation using ...
  • Effects of the actuation on the boundary layer of an airfoil at Reynolds Number Re = 60000 

    Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Borrell Pol, Ricard (Springer-Verlag, 2020-05-29)
    Article
    Restricted access - publisher's policy
    Synthetic (zero net mass flux) jets are an active flow control technique to manipulate the flow field in wall-bounded and free-shear flows. The present paper focuses on the role of the periodic actuation mechanisms on the ...
  • Numerical investigation on the flow around a square cylinder with an upstream splitter plate at low Reynolds numbers 

    An, Bo; Bergadà Granyó, Josep Maria; Mellibovsky Elstein, Fernando; Sang, W.M.; Xi, C. (2020-03-13)
    Article
    Restricted access - publisher's policy
    The present study focuses on the flow over a 2D square cylinder with a plate placed in front of it. An in-house code using the lattice Boltzmann method was employed for all the simulations presented. Few cases were simulated ...
  • Fluidic oscillators, the effect of some design modifications 

    Baghaei, Masoud; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2020-03-20)
    Article
    Open Access
    The number of applications where fluidic oscillators are expected to be used in the future, is raising sharply, then their ability of interacting with the boundary layer to modify forces on bluff bodies, enhancing heat ...
  • New applications of numerical simulation based on lattice Boltzmann method at high Reynolds numbers 

    An, Bo; Bergadà Granyó, Josep Maria; Mellibovsky Elstein, Fernando; Sang, WM (2020-03-15)
    Article
    Restricted access - publisher's policy
    In order to study the flow behavior at high Reynolds numbers, two modified models, known as the multiple-relaxation-time lattice Boltzmann method (MRT-LBM) and large-eddy-simulation lattice Boltzmann method (LES-LBM), have ...
  • Towards a better understanding of wall-driven square cavity flows using the Lattice Boltzmann method 

    An, Bo; Mellibovsky Elstein, Fernando; Bergadà Granyó, Josep Maria; Sang, WM (2020-06-01)
    Article
    Restricted access - publisher's policy
    Wall-driven flow in square cavities has been studied extensively, yet it appears some main flow characteristics have not been fully investigated. Previous research on the classic lid-driven cavity (S1) flow has produced ...

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