Numerical study on the turbulence structures in closely spaced rod bundle subchannels

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Numerical Heat Transfer. Part A, Applications; (United States)

DOI:https://doi.org/10.1080/10407789408955971· OSTI ID:7269926

Wu, X ^[1]

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1. Univ. of Manitoba, Winnipeg (Canada). Dept. of Mechanical Engineering

Fully developed turbulent flow through simulated rod bundle subchannels formed by a rod-trapezoidal duct was numerically studied. With a simple coordinate system transformation from an orthogonal cylindrical system to a nonorthogonal curvilinear system, the highly irregular flow passage of a rod-trapezoidal duct was converted to that of a regular rectangle. An empirical anisotropic eddy viscosity distribution based on existing experimental data was used in conjunction with the algebraic stress model to address the influence of coherent large-scale cross-gap eddy motion, whose existence in closely spaced rod bundle subchannels has bene substantiated by extensive hot-wire measurements. Results of the calculation are compared with experimental data, with emphasis on secondary flow and turbulence kinetic energy. The credibility of this numerical scheme was establishment through a series of numerical tests on simple geometry flows.

• OSTI ID: 7269926
• Journal Information: Numerical Heat Transfer. Part A, Applications; (United States), Journal Name: Numerical Heat Transfer. Part A, Applications; (United States) Vol. 25:6; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

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