An implicit scheme for efficient solution of the coalescence/collision- breakup equation (Q1069805)

Detailed moist-convection models of the atmosphere require solution of the coalescence/collision-breakup equation to predict change in the water-drop spectrum. Under certain meteorological conditions, computational stability problems are encountered in attempting to solve this equation by explicit techniques. A stability analysis is performed making use of empirical results that depend on the form of observed drop spectra and the nature of the equation. Information derived from the analysis is used to design a two-step implicit scheme that provides both stability and efficiency.