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Assessment of Performance of Turbulence Models of CFX in Predicting Supercritical Water Heat Transfer in a Vertical Tube

[+] Author Affiliations
Jie Li, Junchong Yu

Tsinghua University, Beijing, ChinaNuclear Power Institute of China, Chengdu, Sichuan, China

Guangming Jiang

Nuclear Power Institute of China, Chengdu, Sichuan, China

Jiyang Yu

Tsinghua University, Beijing, China

Paper No. ICONE20-POWER2012-54645, pp. 505-509; 5 pages
doi:10.1115/ICONE20-POWER2012-54645
From:
  • 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference
  • Volume 4: Codes, Standards, Licensing, and Regulatory Issues; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Instrumentation and Controls; Fuels and Combustion, Materials Handling, Emissions; Advanced Energy Systems and Renewables (Wind, Solar, Geothermal); Performance Testing and Performance Test Codes
  • Anaheim, California, USA, July 30–August 3, 2012
  • Conference Sponsors: Nuclear Engineering Division, Power Division
  • ISBN: 978-0-7918-4498-4
  • Copyright © 2012 by ASME

abstract

Computational fluid dynamics (CFD) codes are widely used to investigate the thermal hydraulics of revolutionary reactor concepts in the last decade. Most CFD codes, including ANSYS CFX, solve Navier-Stokes equations by Reynolds averaging approach, which use turbulence models and wall functions. These turbulence models and wall function are validated against experimental data under subcritical pressures. However, the applicability of them to supercritical water heat transfer has to be examined. The objective of the present study is to evaluate the performance of the turbulence models of CFX in predicting supercritical heat transfer under non-buoyancy influence and strong buoyancy influence. The calculation results have been compared with two independent validation experimental data. The results indicate the need to improve a turbulence model to take into account the buoyancy effect and property variations on the turbulence for thermal-hydraulic calculations of the supercritical water when the buoyancy influence is strong.

Copyright © 2012 by ASME

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