Now showing items 1-20 of 78

    • A 8-neighbor model lattice Boltzmann method applied to mathematical-physical equations 

      An, Bo; Bergadà Granyó, Josep Maria (2016-10-26)
      Article
      Open Access
      A lattice Boltzmann method (LBM) 9-bit model is presented to solve mathematical-physical equations, such as, Laplace equation, Poisson equation, Wave equation and Burgers equation. The 9-bit model has been verified by ...
    • A complete analysis of axial piston pump leakage and output flow ripples 

      Bergadà Granyó, Josep Maria; Kumar, Sushil; Davies, Dyfyr Ll.; Watton, John (2012-04)
      Article
      Restricted access - publisher's policy
    • A new hybrid optimization method, application to a single objective active flow control test case 

      Coma Company, Martí; Monshi Tousi, Navid; Pons Prats, Jordi; Bugeda Castelltort, Gabriel; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2022-04-12)
      Article
      Open Access
      Genetic Algorithms (GA) are useful optimization methods for exploration of the search space, but they usually have slowness problems to exploit and converge to the minimum. On the other hand, gradient based methods converge ...
    • 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
      Restricted access - publisher's policy
      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 numerical investigation of laminar flow over a backward facing inclined step 

      Mushyam, Aditya; Bergadà Granyó, Josep Maria; Nayeri, C. Navid (2016-08)
      Article
      Open Access
      The aim of the present study is to analyze the two dimensional flow over a backward-facing-inclined step in laminar flow regime. The inspiration for the present work is derived from the fact that in automobile industry, ...
    • A numerical investigation of wake and mixing layer interactions of flow past a square cylinder 

      Mushyam, Aditya; Bergadà Granyó, Josep Maria (2016-02-26)
      Article
      Open Access
      The aim of the present study is to simulate and analyze the interaction of two dimensional flow past a square cylinder in a laminar regime with an upstream mixing layer developed by an axis symmetrical horizontal splitter ...
    • A numerical simulation of fluid-structure interaction for flow through valves of a hermetic compressor with immersed boundary method 

      Mushyam, Aditya; Bergadà Granyó, Josep Maria (2012)
      Conference report
      Restricted access - publisher's policy
    • A simplified new multigrid algorithm of lattice Boltzmann method for steady states 

      An, Bo; Bergadà Granyó, Josep Maria; Sang, W.M (2023-02-01)
      Article
      Restricted access - publisher's policy
      In the present paper, a new strategy of multigrid method is introduced to accelerate the convergence speed of numerical simulations via lattice Boltzmann method. Based on the popular V-cycle multigrid algorithm, a simplified ...
    • Active flow control on laminar flow over a backward facing step 

      Mushyam, Aditya; Bergadà Granyó, Josep Maria (Institute of Physics (IOP), 2015-09-21)
      Article
      Open Access
      In the present study, two dimensional flow over a backward-facing step in laminar flow regime with application of active flow control (AFC) technique is analysed. The aim of the present work is to gauge the effectiveness ...
    • Active flow control on SD7003 airfoil using synthetic jets 

      Tousi, Navid Monshi; Bergadà Granyó, Josep Maria; Rodríguez Pérez, Ivette María (2019)
      Conference report
      Restricted access - publisher's policy
      The present paper focuses on applying the Active Flow Control (AFC) technology on the Selig-Donovan 7003 (SD7003) airfoil at Reynolds number 60,000, the idea is to employ synthetic jets in order to modify the lift and drag ...
    • Active flow control optimisation on SD7003 airfoil at pre and post-stall angles of attack using synthetic jets 

      Monshi Tousi, Navid; Coma Company, Martí; Bergadà Granyó, Josep Maria; Pons Prats, Jordi; Mellibovsky Elstein, Fernando; Bugeda Castelltort, Gabriel (2021-06-10)
      Article
      Open Access
      The use of Active Flow Control (AFC) technologies to modify the forces acting on streamlined bodies is one of the most active research fields in aerodynamics. For each particular application, finding the optimum set of AFC ...
    • Aerodynamic efficiency improvement on a NACA-8412 airfoil via active flow control implementation 

      Couto, Nil; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2022-04-23)
      Article
      Open Access
      The present paper introduces a parametric optimization of several Active Flow Control (AFC) parameters applied to a NACA-8412 airfoil at a single post-stall Angle of Attack (AoA) of 15° and Reynolds number Re = 68.5×103. ...
    • Aerodynamic performances and wake topology past a square cylinder in the interface of two different-velocity streams 

      El Mansy, Reda; Bergadà Granyó, Josep Maria; Sarwar, Wasim; Mellibovsky Elstein, Fernando (American Institute of Physics (AIP), 2022-06-02)
      Article
      Open Access
      We analyze the incompressible flow past a square cylinder immersed in the wake of an upstream splitter plate, which separates two streams of different velocities, UT (top) and UB (bottom). The Reynolds number associated ...
    • Aerodynamic study of the NASA’s X-43A hypersonic aircraft 

      Navó, Alex; Bergadà Granyó, Josep Maria (2022)
      Conference report
      Open Access
      A two-dimensional aerodynamic study of the NASA’s X-43A hypersonic aircraft is developed using two different approaches. The first one is analytical and based on the resolution of the oblique shock wave and Prandtl–Meyer ...
    • Aerodynamic study of the NASA’s X-43A hypersonic aircraft 

      Navó, Alex; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2020-11-19)
      Article
      Open Access
      A 2D aerodynamic study of the NASA’s X-43A hypersonic aircraft is developed using two different approaches. The first one is analytical and based on the resolution of the oblique shock wave and Prandtl–Meyer expansion wave ...
    • Airplane vortices evolution near ground 

      Duro, Josep M; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2021-01-05)
      Article
      Open Access
      Airport traffic around the world has sharply increased over the years; as a result, airports need to be enlarged and the landing or taking off times between two consecutive airplanes must be reduced. To precisely determine ...
    • Analysis of a novel fluidic oscillator under several dimensional modifications 

      Karimzadegan, Kavoos; Mirzaei, Masoud; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2024-02-20)
      Article
      Open Access
      To activate the boundary layer in Active Flow Control (AFC) applications, the use of pulsating flow has notable energy advantages over constant blowing/suction jet injections. For a given AFC application, five parameters, ...
    • Analysis of the forces driving the oscillations in 3D fluidic oscillators 

      Baghaei, Masoud; Bergadà Granyó, Josep Maria (2019-12-11)
      Article
      Open Access
      One of the main advantages of fluidic oscillators is that they do not have moving parts, which brings high reliability whenever being used in real applications. To use these devices in real applications, it is necessary ...
    • Análisis teórico experimental del flujo de aire en toberas de hilatura 

      Bergadà Granyó, Josep Maria; Tornero García, José Antonio; Bailach Bel, Vicenç; Roig Munill, Francesc; Valencia Leonardo, Eugenio; Coll Tortosa, Liberto (Instituto de Investigación Textil y Cooperación Industrial, 2000-01)
      Article
      Open Access
      El laboratorio de Sistemas y Procesos textiles investiga, desde 1994, el sistema de hilatura neumática. El campo de investigación se basa tanto en el estudio del comportamiento mecánico de los órganos que forman el proceso ...
    • Axial piston pumps, new trends and development 

      Bergadà Granyó, Josep Maria; Kumar, Sushil; Watton, John (Nova Science Publishers, 2012-10)
      Part of book or chapter of book
      Restricted access - publisher's policy