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 language | English (US) |
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Pages (from-to) | 473-484 |
Number of pages | 12 |
Journal | Boundary-Layer Meteorology |
Volume | 128 |
Issue number | 3 |
DOIs | |
State | Published - 2008 |
All Science Journal Classification (ASJC) codes
- Atmospheric Science