Classification of Particle by Size Using Aerodynamic Vectoring

An experimental and numerical demonstration of a non-contact particle sorting and particle concentration technique called Aerodynamic Vectoring Particle Sorting (AVPS) is presented. AVPS uses secondary suction control flows to sharply turn a planar, particle-laden jet. As the jet is turned, particles present in the flow experience a resultant drag force dependent upon their size. Since the balance of the drag and inertia determines the particle's trajectory, turning the flow leads to a separation of particles. This simple, low-pressure-drop sorting technique classifies and concentrates particles with less risk of damage or contamination than currently available sorting devices.~AVPS also allows multiple cuts simultaneously. Particle size and trajectory are measured using the Shadowgraphy method.~ Numerical simulations are performed to calculate the 2D turbulent vectored jet flow field using a RANS approach. Currently, AVPS is capable of a cut sharpness of .8 and .9 for industrial and laboratory particles respectively. A concentration factor of 9.5 for particles between 7 and 10 micron has also been achieved.