Title: Rising Intruder Dynamics in Vibrated Gas-Fluidized Granular Materials

Author (Table Talk): Christopher Spitler, Columbia University

Abstract:

The motion of large intruders through smaller grains under forcing is critical to a variety of processes. Here, we present a model to describe the motion of these large intruders in vibrated gas-fluidized granular materials. The model is compared to a significant number of experiments at varying conditions, and accurately predicts the rise velocity of experiments over time and space for all cases. Particle image velocimetry measurements confirm the presence of an added mass force and highlights how particle motion around the intruder varies over the vibration cycle and as a function of intruder velocity.