The Role of Anisotropy in Hopper Flows

In this work, we examine granular flows in a quasi-two-dimensional hopper. We use two high-speed cameras to record granular flows composed of photoelastic disks. Our dual camera approach provides synchronized particle tracking data and the force response of each particle. The photoelastic measurements allow us to extract a measure for the local anisotropy of the stress field. Using this data, we probe the relationship between the local flow dynamics with local measurements of the stress anisotropy, particle density, and pressure in the system. Current work includes correlating these quantities in the context of a shear jamming picture.