MORPHOLOGICAL EVOLUTION IN DLA UNDER ROTATING FLOW

The effect of the rotating flow upon the diffusion-limited aggregation (DLA) is investigated by using a Monte Carlo model. The growth process is governed by the rotating flow and the diffusion. The convective diffusion field is simulated by the biased-random walker. With varying direction and strength of the rotating flow, distinct morphologies develop. By introducing a tangential flow, the diffusion-limited aggregation changes into a single arm which is oppositely vortical to the tangential flow. In the case of both radial and tangential flows, the DLA pattern changes into a multiarm structure. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.