International Journal for Numerical Methods in Fluids

Cover image for Vol. 74 Issue 1

10 January 2014

Volume 74, Issue 1

Pages 1–72

  1. Research Articles

    1. Top of page
    2. Research Articles
    1. Multi-size-mesh multi-time-step algorithm for noise computation on curvilinear meshes (pages 1–33)

      T. Le Garrec, X. Gloerfelt and C. Corre

      Version of Record online: 29 AUG 2013 | DOI: 10.1002/fld.3836

      Thumbnail image of graphical abstract

      A zonal refinement technique is proposed for computational aeroacoustics, where the time step and the mesh size can be doubled between two blocks. Special stencil and multidimensional interpolation schemes are used to preserve a high accuracy on general curvilinear grids. The applicability of the algorithm in three dimensions is eventually demonstrated by computing tonal noise from a moderate Reynolds number flow over an airfoil.

    2. Stability of a Crank–Nicolson pressure correction scheme based on staggered discretizations (pages 34–58)

      F. Boyer, F. Dardalhon, C. Lapuerta and J.-C. Latché

      Version of Record online: 4 AUG 2013 | DOI: 10.1002/fld.3837

      Thumbnail image of graphical abstract

      We propose and analyse a numerical scheme for the variable density Navier–Stokes equations, based on a pressure correction technique, and using a Crank–Nicolson time discretization as well as a staggered non-conforming space discretization. It is built in order to be less dissipative as possible in view of applications in the LES framework.

    3. A novel nonreflecting boundary condition for unsteady flow (pages 59–72)

      Baha Zafer and Can F. Delale

      Version of Record online: 23 AUG 2013 | DOI: 10.1002/fld.3840

      Thumbnail image of graphical abstract

      We introduce a novel one-dimensional nonreflecting boundary condition for use in one-dimensional linear and nonlinear hyperbolic systems to avoid superious reflections from the boundary. Using high-order numerical schemes for transonic nozzle flow with backward acoustic disturbance, implementation of this nonreflecting boundary condition yields results in excellent agreement with the standard nonreflecting boundary condition using characteristics. Results obtained for unsteady cavitating nozzle flows using the novel nonreflecting condition also confirm those obtained by another numerical scheme.

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