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On the improved finite volume procedure for simulation of turbulent flows over real complex terrains

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2015
Authors
Mirkov, Nikola S.
Rasuo, Bosko
Kenjeres, Sasa
Article (Published version)
,
© 2015 Elsevier Inc.
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Abstract
This article presents a new and substantially improved finite volume procedure for simulation of incompressible flows on non-orthogonal grids. Cell-centered least-squares gradients are obtained in a robust and highly accurate way. A new discretization of the diffusive terms is employed, which is based on extension of the original cell-face gradient interpolation and is more suitable for complex grid distortions. A flexible flux-limited interpolation of dependent variables on distorted computational grids is introduced. An efficient preconditioner for Krylov method solution of linear systems is proposed, which substantially improves the solution of Poisson equation for pressure correction. The pressure-correction algorithm is adapted for efficient convergence on highly complex grids using a sequence of non-orthogonal corrector solutions and its effect on iteration convergence is analyzed. The non-orthogonalities treated by current procedure are more accustomed to numerical grids generat...ed from a real complex terrain elevation data. The main focus is on the simulation of atmospheric micro-scale flows pertinent to wind energy application.

Keywords:
Finite volume method / Unsteady incompressible flow / Cell-centered approach / Pressure-correction / Preconditioner / Non-orthogonal grids / Complex terrain
Source:
Journal of Computational Physics, 2015, 287, 18-45
Projects:
  • Development of new meteorological mast for turbulence parameters characterization (RS-33036)
  • Sustainability and improvement of mechanical systems in energetic, material handling and conveying by using forensic engineering, environmental and robust design (RS-35006)

DOI: 10.1016/j.jcp.2015.02.001

ISSN: 0021-9991; 1090-2716

WoS: 000351078400002

Scopus: 2-s2.0-84922998404
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/268
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Vinča

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