Journal
BOUNDARY-LAYER METEOROLOGY
Volume 128, Issue 3, Pages 473-484Publisher
SPRINGER
DOI: 10.1007/s10546-008-9302-1
Keywords
conservative velocity interpolation; divergence free; finite volumes; large-eddy simulation; passive scalars
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Funding
- National Science Foundation [BES-0119903, EAR-0609690]
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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.
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