International Journal for Numerical Methods in Fluids

Cover image for Vol. 71 Issue 11

20 April 2013

Volume 71, Issue 11

Pages 1341–1474

  1. Research Articles

    1. Top of page
    2. Research Articles
    1. An efficient very large eddy simulation model for simulation of turbulent flow (pages 1341–1360)

      Xingsi Han and Siniša Krajnović

      Version of Record online: 13 JUL 2012 | DOI: 10.1002/fld.3714

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      A quite efficient very large eddy simulation turbulence model is proposed. The model was examined for channel flow, periodic hill flow, and flow past a square cylinder and found to be able to produce quite good results on quite coarse mesh compared with traditional large eddy simulation. The model has considerable potential in complex turbulent flow simulation in engineering applications.

    2. Spatial accuracy and performance of a mixed-order, explicit multi-stage method for unsteady flows (pages 1361–1368)

      Jacob Waltz

      Version of Record online: 27 AUG 2012 | DOI: 10.1002/fld.3715

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      We present a simple method for improving performance of explicit 3D compressible flow solvers operating on unstructured tetrahedral grids. We observe speed-ups of approximately a factor of two on problems involving several million computational cells with no loss in accuracy.

    3. Adaptive variational multiscale method for the Stokes equations (pages 1369–1381)

      Lina Song, Yanren Hou and Haibiao Zheng

      Version of Record online: 14 AUG 2012 | DOI: 10.1002/fld.3716

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      The figure presents the adaptive mesh for the driven cavity flow. It shows that the a posterior error estimator based on the local fine scale equations for the variational multiscale finite element approximation to the Stokes equation is reliable.

    4. Three-dimensional finite element modelling of coupled free/porous flows: applications to industrial and environmental flows (pages 1382–1421)

      N.S. Hanspal, V. Nassehi and A. Kulkarni

      Version of Record online: 24 AUG 2012 | DOI: 10.1002/fld.3717

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      This work presents the development of a three-dimensional finite element code based on the successful use of artificial compressibility technique to model coupled free/porous flow regimes. The discretization schemes used generate a unified stabilization for the coupled Navier–Stokes/Darcy system on geometrically complex computational grids, while avoiding the use of iterative techniques and ad hoc interfacial boundary conditions. Numerical computations illustrate the successful and practical implementation of the developed model for complex industrial and environmental flow engineering applications.

    5. Convergence issues in using high-resolution schemes and lower–upper symmetric Gauss–Seidel method for steady shock-induced combustion problems (pages 1422–1437)

      Bin Li and Li Yuan

      Version of Record online: 24 JUL 2012 | DOI: 10.1002/fld.3718

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      The convergence behaviors of typical high-resolution schemes in computing several steady shockinduced combustion problems are explored.

      The five schemes can converge to steady-state solutions for nonreacting flows and simple reacting flows without shock–deflagration coupling but can not converge on fine meshes for cases with shock–deflagration coupling.

      It may be misleading to use steady-state results computed only on coarse to medium meshes in combustion simulation.

    6. Assessment of coupling conditions in water way intersections (pages 1438–1460)

      Michael Herty and Mohammed Seaïd

      Version of Record online: 19 JUL 2012 | DOI: 10.1002/fld.3719

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      The paper discusses conditions for coupling shallow-water dynamics on different canals. A numerical and analytical study is presented.

    7. Application of the VORTFIND algorithm for the identification of vortical flow features around complex three-dimensional geometries (pages 1461–1474)

      Alexander Brian Phillips and Stephen Richard Turnock

      Version of Record online: 27 JUL 2012 | DOI: 10.1002/fld.3720

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      An improved version of the VORTFIND algorithm, which can identify multiple vortices of variable strength and rotational direction using a K-means algorithm is described. The algorithm is applied to velocity fields generated from Reynolds averaged Navier–Stokes simulations to increase the mesh resolution in the vortex core region, ensuring sufficient mesh density to capture the downstream propagation of the vortex for a submarine hull at drift and ship propeller–rudder interaction.

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