Abstract
An experimental set-up was designed, constructed, and used to study the wall deposition rate of particles in a turbulent channel flow. Deposition velocities for two classes of particles, namely, spherical glass particles with diameters of 5–45 μm, and five compact dust components in the size range of 1–10 μm were studied. The particle concentration at the test section was measured with the aid of an isokinetic probe. The particles were deposited onto a flat gold plate covered with a thin film coating. The coating was used to reduce the effect of particle bounce from the surface. The statistics of deposited particles were analyzed by an image processing technique which counts and sizes the particles. The deposition rate of spherical particles was found to increase with diameter. The deposition velocities for compact dust components were found to closely resemble those of equivalent spherical particles. The measured deposition velocities were in good agreement with the available experimental data and the empirical model.
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