International Journal for Numerical Methods in Fluids

Cover image for Vol. 73 Issue 5

20 October 2013

Volume 73, Issue 5

Pages 409–508

  1. Research Articles

    1. Top of page
    2. Research Articles
    1. A dimension split method for the incompressible Navier–Stokes equations in three dimensions (pages 409–435)

      H. Chen, K. Li and S. Wang

      Version of Record online: 15 MAY 2013 | DOI: 10.1002/fld.3803

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      In this paper, we describe a dimension split method (DSM) for the three-dimensional steady incompressible Navier–Stokes equations. The basic idea of DSM is that three-dimensional space is split up into a cluster of two-dimensional manifolds and then the three-dimensional solution is approximated by the solutions on these two-dimensional manifolds. Because of split property of DSM, all computation is carried out on these two-dimensional manifolds, which greatly reduces the difficulty in the mesh generation; moreover, these two-dimensional problems can be computed simultaneously.

    2. Validation of a novel very large eddy simulation method for simulation of turbulent separated flow (pages 436–461)

      Xingsi Han and Siniša Krajnović

      Version of Record online: 15 MAY 2013 | DOI: 10.1002/fld.3807

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      Detailed validation of a newly developed very LES model is presented for the turbulent separated flows such as the flow past a square cylinder, circular cylinder, and a backward-facing step at different Reynolds number. The model was found to be able to produce quite satisfactory results on quite coarse mesh compared with conventional LES. The model has considerable potential in the predictions of complex turbulent high-Reynolds-number flow in engineering applications.

    3. Wavelet-based data compression for flow simulation on block-structured Cartesian mesh (pages 462–476)

      Ryotaro Sakai, Daisuke Sasaki, Shigeru Obayashi and Kazuhiro Nakahashi

      Version of Record online: 15 MAY 2013 | DOI: 10.1002/fld.3808

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      A data compression method based on image encoding techniques is presented and applied to the flow simulation data sets, including flow around a Formula 1 racing car with O( 108) mesh points. Visualization of flow field indicates compressed data reproduce velocity distribution well, compared with the original data. The data size after the compression is only 3.68% of the original data, showing good performance of the present method in terms of compressed data quality and data compression ratio.

    4. Two-dimensional two-layer shallow water model for dam break flows with significant bed load transport (pages 477–508)

      Catherine Swartenbroekx, Yves Zech and Sandra Soares-Frazão

      Version of Record online: 16 MAY 2013 | DOI: 10.1002/fld.3809

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      To predict the bed load transport induced by dam break waves over a mobile bed, the proposed two-dimensional two-layer shallow water description considers an upper layer made of clear water and a lower layer made of a dense mixture of water and moving grains. The system of governing equations, written so that the conservative part is hyperbolic, is solved by an HLL finite volume scheme on an unstructured triangular mesh. The numerical model is tested against laboratory experiments of waves expanding over sand beds in an abrupt enlargement and over a floodplain.