Abstract: Scavenging of 2 or 4 g cm?3 spherical aerosol particles by thin ice plates, idealized as oblate spheroids of axis ratio 0.05, was numerically modeled for atmospheric conditions of ?18°C and 400 mb. Ice crystal semi-major ...

Abstract: The investigation of Pitter and Prappacher (1974) was reexamined including the effect of changing drag on the accelerating water drops and the effect of the drop flow field on the ice crystal. The present results indicate ...

Abstract: Two mechanisms of ice crystal formation, contact freezing and very rapid condensation freezing, were applied to numerical simulations of ground-based seeding with the Guide Model, an orographic cloud model, to study whether ...

Abstract: The hydrodynamic interaction between simple ice plates, idealized as oblate spheroids of axis ratio 0.05, and water drops, assumed to be spherical, was numerically investigated for atmospheric conditions of ?10C and 700 ...

Abstract: A physical model which predicts the shape of water drops falling at terminal velocity in air is presented. The model is based on a balance of the forces which act on a drop falling under gravity in a viscous medium. The ...

Abstract: Numerical solutions have been found for the vapor density field around a simple ice plate, idealized as an oblate spheroid of axis ratio 0.05, having Reynolds numbers between 0.1 and 20, and failing in a fluid of Schmidt ...

Abstract: The flow past a thin oblate spheroid falling at terminal velocity in an infinite, viscous fluid was investigated using a numerical solution of the steady-state Navier-Stokes equations of motion. The detailed streamfunction ...

Abstract: A theoretical model is presented which allows determination of the efficiency with which electrically charged, simple planar ice crystals collide with electrically charged supercooled cloud drops. The calculations are ...

Abstract: A system is described for measurement and analysis of precipitation particle charge from an aircraft in the highly variable and harsh environment of a convective cloud. A compromise, practical instrument design enables ...