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NUMERICAL TECHNIQUES TO SOLVE CONDENSATIONAL AND DISSOLUTIONAL GROWTH EQUATIONS WHEN GROWTH IS COUPLED TO REVERSIBLE REACTIONS (R823186)
Jacobson, M. Z. NUMERICAL TECHNIQUES TO SOLVE CONDENSATIONAL AND DISSOLUTIONAL GROWTH EQUATIONS WHEN GROWTH IS COUPLED TO REVERSIBLE REACTIONS (R823186). AEROSOL SCIENCE AND TECHNOLOGY. Taylor & Francis, Inc., Philadelphia, PA, 27:491-498, (1997).
Noniterative, unconditionally stable numerical techniques for solving condensational and
dissolutional growth equations are given. Growth solutions are compared to Gear-code solutions for
three cases when growth is coupled to reversible equilibrium chemistry. In all cases, results from the
new growth schemes matched Gear-code solutions nearly exactly when growth and equilibrium
calculations were operator-split with a 1 s time interval. Results also matched well for a 15 s interval.
With a 15 s interval, the growth-equilibrium schemes can be used in a three-dimensional model.
Longer operator splitting intervals, in some cases, induced oscillations in concentrations caused by
delays in feedback between equilibrium and growth calculations. Simulation results indicated that
gases and aerosols were closer to equilibrium when the relative humidity was 90% than when it was
40%. (C) 1997 American Association for Aerosol Research. (25 References)
Record Details:Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL CENTER FOR ENVIRONMENTAL RESEARCH