A hybrid spectral/finite-volume algorithm for large-eddy simulation of scalars in the atmospheric boundary layer

Marcelo Chamecki, Charles Meneveau, Marc B. Parlange

Research output: Contribution to journalArticleResearchpeer-review

30 Citations (Scopus)

Abstract

Pseudospectral methods are frequently used in the horizontal directions in large-eddy simulation of atmospheric flows. However, the same approach often creates unphysical oscillations for scalar fields if there are horizontal heterogeneities in the sources and/or sinks, as is usual in air pollution problems. A hybrid approach is developed to combine the use of pseudospectral representation of the velocity field and bounded finite-volumes for the scalar concentration. An interpolation scheme that yields a divergence-free interpolated velocity field is derived and implemented, and its importance is illustrated by two sample applications.

Original languageEnglish
Pages (from-to)473-484
Number of pages12
JournalBoundary-Layer Meteorology
Volume128
Issue number3
DOIs
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • Conservative velocity interpolation
  • Divergence free
  • Finite volumes
  • Large-eddy simulation
  • Passive scalars

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