  We study deposition and impact of heavy particles onto an in-line tube-banks
within a turbulent cross flow through Lagrangian particle tracking coupled with
an LES modelling framework. The flow Reynolds number based on the cylinder
diameter D and flow velocity between the gap of two vertically adjacent
cylinders is 33960. We examine the flow structures across the tube bank and
report surface pressure characteristics on cylinders. Taking into account
particle-wall impact and bounce, we study dispersion and deposition of three
sets of particles (St = 0.35, 0.086, 0.0075) based on 107 particles tracked
through the turbulent flow resolved by LES. The deposition efficiency for the
three sets of particles are reported across the tube-banks. Positions of
particle deposited onto tube-banks shows that significantly more of smaller
particles deposit onto the back-side of the back-banks. This suggests that the
smaller particles are easier to be entrained into the wake and impact onto the
back-side of cylinders.
