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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 8 (1996), S. 1856-1868 
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Low turbulent Reynolds number direct simulation data are used to calculate the invariants of the Reynolds stress and the turbulent dissipation rate in a square duct. The results show that, depending on the region where the analysis is carried out, the turbulent flow field comes close to one-, two-, and three-component states. Modeling such flows—even at higher Reynolds numbers—will require models that can approach all three states. A number of related nonlinear k-ε models are tested a priori using the direct simulation data. The numerical simulation using Reynolds averaged Navier–Stokes equations with these models was performed. Their ability to predict the secondary flows, with a low-Reynolds k-ε model, cannot be gauged from realizability. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Computational mechanics 23 (1999), S. 98-107 
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract High-performance parallel computer systems have been employed to compute a variety of three-dimensional incompressible fluid flows. Three different numerical methods have been used for the discretization of the Navier-Stokes equations, with domain decomposition techniques employed for the parallel resolution of the discretized equations. These parallel flow solvers have been applied to the numerical simulation of different flows, ranging from basic flow studies to industrial applications. The results of these studies show that high-performance parallel computing has evolved from its initial investigative phase into a mature technology that can be employed for large-scale numerical flow simulation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of scientific computing 9 (1994), S. 107-122 
    ISSN: 1573-7691
    Keywords: Navier-Stokes equations ; spectral-element discretization ; iterative methods ; preconditioning ; Uzawa decoupling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Seven preconditioners for the Uzawa pressure operator are discussed in the context of the spectral-element discretization of unsteady, incompressible flows. An already existing algorithm, based on decomposition of the pressure operator, is modified in order to reduce the number of iterations and cpu time. A twostage preconditioning technique is set up to solve efficiently problems at high Reynold numbers. The performance of the preconditioners is tested on a number of Stokes and Navier-Stokes problems in three dimensions.
    Type of Medium: Electronic Resource
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