International Journal for Numerical Methods in Fluids

Cover image for Vol. 74 Issue 6

28 February 2014

Volume 74, Issue 6

Pages 387–467

  1. Research Articles

    1. Top of page
    2. Research Articles
    1. A multimesh adaptive scheme for air quality modeling with the finite element method (pages 387–405)

      Lluís Monforte and Agustí Pérez-Foguet

      Version of Record online: 23 OCT 2013 | DOI: 10.1002/fld.3855

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      A multi-mesh adaptive scheme for transport-reaction problems with a large number of unknowns is presented, in particular for 3D micro-scale Air Quality Modeling. Computational time and the memory requirements of single-mesh and multi-mesh strategies are compared with different nonlinear reaction models. A punctual emission problem is solved with the CB05 model, which involves 62 species, and with realistic background concentrations and atmospheric conditions.

    2. Adaptive computation of aeroacoustic sources for a rudimentary landing gear (pages 406–421)

      Rodrigo Vilela de Abreu, Niclas Jansson and Johan Hoffman

      Version of Record online: 4 NOV 2013 | DOI: 10.1002/fld.3856

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      The flow past a rudimentary landing gear is simulated using an adaptive FEM, which is a novel approach for computing unsteady, turbulent flows in aeroacoustic applications. The results are validated by measurements, and the method appears to be a suitable choice for the computation of sound sources.

    3. Simple and efficient numerical methods for vortex sheet motion with surface tension (pages 422–438)

      Suyeon Shin, Sung-Ik Sohn and Woonjae Hwang

      Version of Record online: 29 OCT 2013 | DOI: 10.1002/fld.3857

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      The stability of the present numerical method for the vortex sheet with surface tension is shown. The linear growth rate converges to the exact dispersion relation.

    4. A comparative study of lattice Boltzmann methods using bounce-back schemes and immersed boundary ones for flow acoustic problems (pages 439–467)

      Li Chen, Yang Yu, Jianhua Lu and Guoxiang Hou

      Version of Record online: 4 NOV 2013 | DOI: 10.1002/fld.3858

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      Comparable studies between three kinds of bounce-back schemes and five immersed boundary ones on lattice Boltzmann method have been carried out. The unified interpolation bounce-back, implicit diffused, and ghost fluid immersed-boundary methods are better in acoustic problems. Moreover, through the comparative tests among four kinds of treatments to reduce the spurious pressure wave generated from the fresh nodes that transferred from solid node to fluid node after the boundary's moving, we have proposed and found the most efficient one, local evolutionary iteration.