Particle deposition in a high temperature fully developed turbulent channel flow

Deposition of particles through turbulent boundary layers onto external surfaces is infamous for its catastrophic effects in spacecraft landings, jet engine deposition, and more. To reproduce a relevant environment for these extreme conditions, a high temperature 2D fully developed channel was constructed to focus on the temperature effects in particle deposition. The temperature of the facility is systematically varied between the glass-transition point ([endif]-->) and melting point ([endif]-->) of the soda-lime glass beads used for these experiments. The Lagrangian trajectories of these particles as they approach and collied with the wall were acquired using a particle tracking algorithm. The deposition pattern was measured using a Digital Image Project technique (DIP), which obtained the time-resolved evolution of the topography of deposition. The final deposition composition is provided by a micro-CT scanner, which allows us to determine the deformation of softened particles as they collide with one another. The results from this facility will provide valuable data that will lead to a better understanding of particle-turbulence interactions and how temperature changes the deposition pattern and growth by affecting the particle sticking probability.