  Deposits which form during the pneumatic transport of particles are a
frequent source of explosions in industrial facilities. Thus, to contribute to
the operational safety of industrial plants, we explore the deposit formation
of powder flows with our new experimental test-rig. To this end, the particle
flow was analyzed optically using a square-shaped transparent pipe as a
measuring section. We characterized the deposit pattern and quantified the
fraction of particles that deposit depending on the flow conditions. The
parameters under consideration included the flow Reynolds number, the powder
loading, the duct material, and the ambient conditions (temperature, humidity).
More specifically, we investigated the transport of polydisperse PMMA particles
through pipes made of PMMA and PC.
