Electrostatic effects on deposition pattern and kinematic statistics of inertial particles in turbulent wall-bounded flow

Particles in wall-bounded turbulence is a canonical problem that captures the essential physics in many applications, such as spacecraft landings, dust storms, and sand deposition in jet engines. These phenomena involve particle-turbulence interactions that are further complicated through long range electrostatic interactions between particles and the wall. This could modify the mechanisms leading to particle deposition which become of crucial concern for many applications. To better understand this problem, experiments were conducted to study the near-wall motion of charged particles in a turbulent boundary layer. In addition, the deposition pattern and its evolution in time with Lagrangian particle trajectories were obtained to elucidate what leads the particles towards deposition or collision. The charge of the particles is systematically changed using an ionization wire. These experimental results will provide valuable data that will lead to a better understanding of particle-turbulence interactions and how electrostatics influences those interactions.