International Journal for Numerical Methods in Fluids

Cover image for Vol. 74 Issue 3

30 January 2014

Volume 74, Issue 3

Pages 153–230

  1. Research Articles

    1. Top of page
    2. Research Articles
    3. Erratum
    1. CAD-based shape optimisation with CFD using a discrete adjoint (pages 153–168)

      Shenren Xu, Wolfram Jahn and Jens-Dominik Müller

      Article first published online: 19 SEP 2013 | DOI: 10.1002/fld.3844

      Thumbnail image of graphical abstract

      Gradient-based shape-optimisation is performed with the CAD description in the design loop by modifying the control points of the NURBS patches. The NURBS description guarantees a smooth shape, the algorithm maintains continuity between patch interfaces, which is essential for industrial application and generic CAD geometries. The figure shows initial and final shape and contours of velocity magnitude for an industrial air duct when minimising the pressure drop. The approach produces significant deformations, the streak-like deformation suppresses separation and secondary flow.

    2. Dynamic coefficient evaluation for an algebraic subgrid stress model (pages 169–188)

      S. Bhushan and D.K. Walters

      Article first published online: 19 SEP 2013 | DOI: 10.1002/fld.3845

      Thumbnail image of graphical abstract

      The model coefficients of an algebraic subgrid stress model are computed using a dynamic approach to investigate inconsistencies in energy transfer predictions by the previously documented coefficients. The study emphasizes that subgrid stress model development should use filter functions consistent with those of application solver to arrive at robust models. The revised algebraic model and transfer coefficients are found to be robust compared to previous coefficients for isotropic decaying and channel flow simulations.

    3. Assessment of different reconstruction techniques for implementing the NVSF schemes on unstructured meshes (pages 189–221)

      Di Zhang, Chunbo Jiang, Chen Yang and Yan Yang

      Article first published online: 20 SEP 2013 | DOI: 10.1002/fld.3846

      Thumbnail image of graphical abstract

      The key findings are as follows: (1) Our analysis leads to the conclusion that the two techniques found in the literature, which facilitate the implementation of standard NVD/NVSF schemes on arbitrary unstructured meshes, are thoroughly equivalent in nature. (2) In order to overcome the two inherent drawbacks of the original technique, three new far-upwind reconstruction techniques are put forward in this paper. The numerical results clearly show that New-Technique-2 leads to a better overall performance on accuracy and convergence.

    4. A nonconforming finite element method for the Stokes equations using the Crouzeix-Raviart element for the velocity and the standard linear element for the pressure (pages 222–228)

      Bishnu P. Lamichhane

      Article first published online: 11 OCT 2013 | DOI: 10.1002/fld.3848

      Thumbnail image of graphical abstract

      We present a finite element method for Stokes equations using the Crouzeix-Raviart element for the velocity and the continuous linear element for the pressure. We show that the inf-sup condition is satisfied for this pair. Two numerical experiments are presented to support the theoretical results.

  2. Erratum

    1. Top of page
    2. Research Articles
    3. Erratum
    1. You have free access to this content
      SWASHES: a compilation of shallow water analytic solutions for hydraulic and environmental studies (pages 229–230)

      Olivier Delestre, Carine Lucas, Pierre-Antoine Ksinant, Frédéric Darboux, Christian Laguerre, T.-N.-Tuoi Vo, François James and Stéphane Cordier

      Article first published online: 28 NOV 2013 | DOI: 10.1002/fld.3865

      This article corrects:

      SWASHES: a compilation of shallow water analytic solutions for hydraulic and environmental studies

      Vol. 72, Issue 3, 269–300, Article first published online: 25 OCT 2012

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