Abstract
This paper presents a direct numerical simulation of the flow in a randomly packed pebble bed. Nek5000, a spectral-element computational fluid dynamics code, was used to develop DNS fluid flow data, including first- and second-order statistics for an experimental randomly packed pebble bed. The flow domain consisted of 147 pebbles enclosed by a bounding wall. In the presented work, the Reynolds number is 1700 based on the hydraulic diameter and interstitial velocity. First- and second-order statistics were compared with the experimental data. POD analysis was presented in order to identify dominant flow structures.
| Original language | English |
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| Title of host publication | ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics |
| Publisher | American Nuclear Society |
| Pages | 402-412 |
| Number of pages | 11 |
| ISBN (Electronic) | 9780894487774 |
| State | Published - 2020 |
| Externally published | Yes |
| Event | 2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020 - Virtual, Online Duration: Oct 20 2020 → Oct 23 2020 |
Publication series
| Name | ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics |
|---|
Conference
| Conference | 2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020 |
|---|---|
| City | Virtual, Online |
| Period | 10/20/20 → 10/23/20 |
Funding
The authors would like to thank Dr. Thien Duy Nguyen and Robert Muyshondt for their work at the experimental facility. Also, the authors would like to acknowledge the Argonne Leadership Computing Facility (ALCF) for the provided computational resources.
Keywords
- Direct Numerical Simulation
- Proper Orthogonal Decomposition
- Randomly Packed Pebble Bed