Particle deposition behaviour in fully developed turbulent flows

The purpose of this work is to investigate theoretically and experimentally the concept of the deposition behavior of fine (aerosol) droplets in fully developed turbulent flows, in a horizontal, straight smooth circular duct under isothermal conditions. The theory reviews the fundamentals of past research and new developments on this topic, in an attempt to explain the mechanism and subsequently to predict particle deposition rates. The experiments consisted of (1) fluid flow measurements, (2) isokinetic particle sampling measurements, and (3) in-situ counting of particles which adhered to the inside surface of a glass extension to the stainless steel wind tunnel, by means of a laser non-imaging and near forward light scattering technique. The particles used were di-2-ethyl hexyl sebacate aerosol droplets of size range 0.5-4.0 microns, which were dispersed in a fully developed turbulent flow field of Reynolds numbers ranging between 10,000 to 80,000.