Pohlman, Nicholas A.
M.S. (Master of Science)
Department of Mechanical Engineering
Granular flows are complex phenomena bridging both fluid and solid mechanics and observed frequently in the natural world. The transitional dynamics of acceleration from solid body motion to rapid flow can affect many aspects including volume flow rates and mixing behaviors. In order to study the combination of both variables together within polygon-shaped tumblers, control systems are necessary with a corresponding user interface. This thesis reports an interface for changing variable inputs to the system. Predictions of rotation rates with corresponding interfaces with hardware connections are described. Results of image analysis verify output performance that incorporates the following variable changes: 1. Number of sides of the polygon, 2. Number of oscillations between vertices, 3. Phase of acceleration or deceleration at start, 4. Long-time performance in time-based digital data acquisition controls. The mechanisms for operation offer suggestions on the next improvements and preparing the software and hardware for future experiments in granular segregation and velocity measurements.
Mcmahon, Michaela, "Integrating Experimental Parameter Space for Granular Flow within Polygon Tumblers" (2022). Graduate Research Theses & Dissertations. 7424.
Northern Illinois University
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