Now showing items 1-12 of 65

  • Saturn atmospheric dynamics one year after Cassini: Long-lived features and time variations in the drift of the Hexagon 

    Hueso, Ricardo; Sánchez Lavega, Agustín; Rojas, Jose Félix; Simon, Amy A.; Barry, Trevor; del Rio Gaztelurrutia, Teresa; Antuñano, Arrate; Sayanagi, Kunio; Delcroix, M.; Fletcher, Leigh N.; García Melendo, Enrique José; Pérez Hoyos, Santiago; Blalock, J; Colas, Françoise; Gómez Forrellad, Josep Maria; Gunnarson, J. L.; Peach, D.; Wong, Michael (2020-01-15)
    Article
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    We examine Saturn's atmospheric dynamics with observations in the visible range from ground-based telescopes and Hubble Space Telescope (HST). We present a detailed analysis of observations acquired during 2018 obtaining ...
  • A complex storm system in Saturn's north polar atmosphere in 2018 

    Sánchez Lavega, Agustín; García Melendo, Enrique José; Legarreta, Jon J.; Hueso, Ricardo; del Rio Gaztelurrutia, Teresa; Sanz-Requena, Jose Francisco; Pérez Hoyos, Santiago; Simon, Amy A.; Wong, Michael; Soria Guerrero, Manel; Gómez Forrellad, Josep Maria; Barry, Trevor; Delcroix, Marc; Sayanagi, Kunio; Blalock, J; Gunnarson, J. L.; Dyudina, Uliana; Ewald, S. (Springer Nature, 2019-10-21)
    Article
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    Saturn’s convective storms usually fall in two categories. One consists of mid-sized storms ~2,000¿km wide, appearing as irregular bright cloud systems that evolve rapidly, on scales of a few days. The other includes the ...
  • The lid-driven right-angled isosceles triangular cavity flow 

    An, Bo; Bergadà Granyó, Josep Maria; Mellibovsky Elstein, Fernando (2019-09-25)
    Article
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    We employ lattice Boltzmann simulation to numerically investigate the two-dimensional incompressible flow inside a right-angled isosceles triangular enclosure driven by the tangential motion of its hypotenuse. While the ...
  • A review study on the modeling of high-temperature solar thermal collector systems 

    Hachicha, Ahmed A.; Yousef, Bashria A.A.; Said, Zafar; Rodríguez Pérez, Ivette María (2019-09-01)
    Article
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    Concentrated solar power technologies are gaining more attention in the last two decades in order to replace the conventional power technologies and reduce their environmental impact. Among the developed concentrating ...
  • On the exploitation of differential aerodynamic lift and drag as a means to control satellite formation flight 

    Traub, Constantin; Romano, Francesco; Binder, Tilman; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (springer-Verlag, 2019-05-27)
    Article
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    For a satellite formation to maintain its intended design despite present perturbations (formation keeping), to change the formation design (reconfiguration) or to perform a rendezvous maneuver, control forces need to be ...
  • Analysis of mobility patterns and intended use of shared mobility services in the Barcelona region 

    Gilibert Junyent, Mireia; Ribas Vila, Immaculada; Rodríguez Donaire, Silvia (2019)
    Conference report
    Open Access
    Social and economic trends have strongly changed in the last years due to the economic crisis and the evolution of technology. These factors have influenced a sharing revolution, also in the mobility sector motivated for ...
  • Fluid power, mathematical design of several components 

    Bergadà Granyó, Josep Maria; Kumar, Sushil (2014-05-30)
    Book
    Open Access
    Fluid power scientists and engineers have produced a large amount of high quality books so far, which cover a vast amount of technologies involved in this field. Names like H. Merritt, D. McCloy, H.R. Martin, W. Backe, J ...
  • SOAR - Satellite for Orbital Aerodynamics Research 

    Crisp, Nicholas H.; Roberts, Peter C.E; Edmonson, Steve; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2018)
    Conference report
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    SOAR (Satellite for Orbital Aerodynamics Research) is a CubeSat mission designed to investigate the interaction betweendifferent materials and the atmospheric flow regime in Very Low Earth Orbits (VLEO) and to demonstrate ...
  • Advances on the Inductive Plasma Thruster Design for an Atmosphere-Breathing EP System 

    Romano, Francesco; Herdrichd, Georg H.; Boxberger, Adam; Rodríguez Donaire, Silvia; García-Almiñana, Daniel; Sureda Anfres, Miquel (International Astronautical Federation, 2018)
    Conference report
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    Challenging space mission scenarios include those in very low Earth orbits, where the atmosphere creates significant drag to the S/C and forces their orbit to an early decay. For drag compensation, propulsion systems are ...
  • A low-dissipation finite element scheme for scale resolving simulations of turbulent flows 

    Lehmkuhl, Oriol; Houzeaux, Guillaume; Owen, Herbert; Chrysokentis, Giorgios; Rodríguez Pérez, Ivette María (2019-08-01)
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    The present work extends the conservative convective scheme proposed by Charnyi et al. (2017) [13], originally formulated for mixed finite elements and tested in laminar flows, to equal order finite elements. A non-incremental ...
  • A novel method to determine the discharge coefficient of constant section nozzles under compressible dynamic flow conditions 

    Comas Amengual, Ángel; Río Cano, Carlos; Bergadà Granyó, Josep Maria (2019-07)
    Article
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    The present paper introduces a novel transient experimental method employed to determine the discharge coefficient of constant section nozzles of small diameters of 1 to 3 mm and with a length/diameter ratio of around one. ...
  • A Review and Gap Analysis of Exploiting Aerodynamic Forces as a Means to Control Satellite Formation Flight 

    Traub, Constantin; Romano, F.; Binder, Tilman; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2018)
    Conference report
    Restricted access - publisher's policy
    Using several small, unconnected satellites flying in formation rather than a single monolithic satellite has many advantages. As an example, separate optical systems can be combined to function as a single larger (synthetic) ...