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Talk Abstract:
Evaluation of Two Numerical Algorithms in Simulating Particle Condensational
Growth and Gas/Particle Mass Transfer
Yang
Zhang
Atmospheric and Environmental Research, Inc.
2682 Bishop Drive, Suite 120
San Ramon, CA 94583
yzhang@aer.com
Joint
work with Christian Seigneur.
Different numerical algorithms have been used in air quality
PM models to minimize numerical diffusion when simulating aerosol
dynamic processes with a sectional representation of particle
size. We evaluated two numerical algorithms (the Bott and the
spline interpolation algorithms) that are used in 3-D PM models
to simulate particle condensational growth and gas/particle
mass transfer. For simulation of condensational growth, the
Bott algorithm causes some upstream numerical diffusion for
the fine particle size range (with diameter < 0.1 micro meter),
whereas the spline interpolation algorithm leads to significant
numerical diffusion over a large particle diameter range of
0.01- 2.5 micro meter. For simulation of gas/particle mass transfer,
the two algorithms predict similar particle size distribution
for cases without NaCl, however, they predict significantly
different particle size distribution for cases with NaCl.
Material
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1999-2000
Reactive Flow and Transport Phenomena
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