In this paper, computational fluid dynamics (CFD) gas flow simulations are carried out. In CFD calculations, geometry modeling and physical modeling are crucial to CFD results. The effects of the treatments of the inter-pebble contacts on gas flow fields and heat transfer are examined; a sensitivity analysis for the gap size is conducted with two spherical pebbles, in which the inter-pebble region is modeled by means of two types of inter-pebble gaps and two kinds of direct contacts. On the other hand, both of large eddy simulation (LES) and Reynolds-averaged Navier-Stokes (RANS) models are employed to investigate the turbulent effects. It is found that the flow fields and relevant heat transfer are significantly dependent on the modeling of the inter-pebble regions. The calculations indicate the complex flow structures present within the voids between the fuel pebbles.
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18th International Conference on Nuclear Engineering
May 17–21, 2010
Xi’an, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4934-7
PROCEEDINGS PAPER
Gas Flow Simulations in Randomly Distributed Pebbles
Xiang Zhao,
Xiang Zhao
Alabama A&M University, Huntsville, AL
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Trent Montgomery,
Trent Montgomery
Alabama A&M University, Huntsville, AL
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Sijun Zhang
Sijun Zhang
ESI CFD, Inc., Huntsville, AL
Search for other works by this author on:
Xiang Zhao
Alabama A&M University, Huntsville, AL
Trent Montgomery
Alabama A&M University, Huntsville, AL
Sijun Zhang
ESI CFD, Inc., Huntsville, AL
Paper No:
ICONE18-29785, pp. 171-179; 9 pages
Published Online:
April 8, 2011
Citation
Zhao, X, Montgomery, T, & Zhang, S. "Gas Flow Simulations in Randomly Distributed Pebbles." Proceedings of the 18th International Conference on Nuclear Engineering. 18th International Conference on Nuclear Engineering: Volume 6. Xi’an, China. May 17–21, 2010. pp. 171-179. ASME. https://doi.org/10.1115/ICONE18-29785
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