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  Acceleration of steady-state lattice Boltzmann simulations for exterior flows

Liu, B., & Khalili, A. (2008). Acceleration of steady-state lattice Boltzmann simulations for exterior flows. Physical Review E, 78(5): 056701.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-CD10-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-7CF5-A
Genre: Journal Article

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Liu8.pdf (Publisher version), 211KB
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 Creators:
Liu, B.1, Author              
Khalili, A.1, Author              
Affiliations:
1Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481693              

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 Abstract: The simulation of a stationary fluid flow past an obstacle by the lattice Boltzmann method (LBM) in two dimensions is discussed. The combination of second-order expressions for far-field boundary conditions and a suitable treatment of the no-slip boundary condition at the obstacle surface with the nested grid-refinement technique can be applied to the LBM, resulting in a highly efficient method for the treatment of exterior flows. Furthermore, via replacing the nested time stepping by local time stepping, the resolution process can be substantially accelerated. A highly accurate drag coefficient was used to make an error assessment for various no-slip boundary conditions imposed on the obstacle surface. The analysis showed that the equilibrium method for treating the no-slip conditions is superior to halfway bounce-back and full-way bounce-back no-slip conditions when the relaxation time τ=1. Also a τ-dependence test was made to evaluate the performance of different methods in the treatment of the no-slip boundary conditions.

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Language(s): eng - English
 Dates: 2008-11-05
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 420275
ISI: 000261213800056
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Title: Physical Review E
  Other : Phys. Rev. E
Source Genre: Journal
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Publ. Info: Melville, NY : American Physical Society
Pages: - Volume / Issue: 78 (5) Sequence Number: 056701 Start / End Page: - Identifier: ISSN: 1539-3755
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012