Time-Resolved Velocity Measurements in a Matched Refractive Index Facility of Randomly Packed Spheres

• DOI: 10.1115/icone26-82425
• Publication Date: 2018-10-25T02:24:43Z
• Authors: Ethan Kappes; Mateusz Marciniak; Andrew Mills; Robert Muyshondt; Stephen King; Thien D. Nguyen; Yassin A. Hassan; Victor Ugaz
• Keywords: Reynolds stress; Velocimetry; Root mean square

Complex geometries and randomly connected void spaces within packed beds have hindered efforts to characterize the underlying transport phenomena occurring within. In this communication, we present our experimental studies on a facility of spheres that can be representative sections reactor core in nuclear power plant. The results high-fidelity velocity measurements seen using Time-Resolved Particle Image Velocimetry (TR-PIV) at pore scales near wall boundary Matched Index Refraction (MIR) facility. MIR approach allows for non-invasive analysis flow microscopic with high temporal spatial resolution. Flow characteristics obtained from TR-PIV various Reynolds numbers are presented. include first- second-order statistics, such as mean velocity, root-mean-square fluctuating stresses. Effects patterns currently being investigated. Comparisons velocities, stress components show increase mixing turbulent intensities gaps between bed. Sizes recirculation regions, however, seem independent numbers.