PARTICLE DEPOSITION TO PROTRUDING LOCAL SINKS ADHERING ON A COLLECTORSURFACE

In this paper, we measured the local initial deposition rates of strep tococci to adhering actinomyces, acting as protruding local sinks on a glass collector, as a function of the actinomyces density in a parall el plate flow chamber. The local initial deposition rates, i.e., depos ition in the vicinity of actinomyces, j(0,1) compared well with values predicted by a model based on convective diffusion perpendicular to t he collector surface and convection parallel to the collector surface when the seeding density of adhering actinomyces was below 0.5 x 10(6) cm(-2) (0.03% surface coverage). However, at higher sink densities th e model breaks down due to particle depletion of the suspension downst ream of a protruding sink.