Experimental investigation of the particle‐wall‐impact under particular consideration of the wall surface influence on the particle trajectory and the transition between sliding and adhering impact

We present results of the experimental investigation of the impact of particles on a rough wall. The particle-wall impact influences considerably the behavior of particle laden gas flows. The aim of the present work is to study the influence of the wall roughness on the particle trajectory and the particle rotation after impact. The measurements were carried out in a special test facility, which allows the investigation of single particle-wall impacts. Particle velocities and trajectories were recorded by a video system and evaluated by using a particle tracking technique. (© 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)