Dynamic subgrid scale model of large eddy simulation of cross bundle flows

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:271934

Hassan, Y A; Barsamian, H R ^[1]; Srikantiah, G ^[2]

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1. Texas A and M Univ., College Station, TX (United States). Dept. of Nuclear Engineering
2. Electric Power Research Inst., Palo Alto, CA (United States)

The dynamic subgrid scale closure model of Germano et. al (1991) is used in the large eddy simulation code GUST for incompressible isothermal flows. Tube bundle geometries of staggered and non-staggered arrays are considered in deep bundle simulations. The advantage of the dynamic subgrid scale model is the exclusion of an input model coefficient. The model coefficient is evaluated dynamically for each nodal location in the flow domain. Dynamic subgrid scale results are obtained in the form of power spectral densities and flow visualization of turbulent characteristics. Comparisons are performed among the dynamic subgrid scale model, the Smagorinsky eddy viscosity model (that is used as the base model for the dynamic subgrid scale model) and available experimental data. Spectral results of the dynamic subgrid scale model correlate better with experimental data. Satisfactory turbulence characteristics are observed through flow visualization.

• OSTI ID: 271934
• Report Number(s): CONF-960306--; ISBN 0-7918-1226-X
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
FLOW MODELS
INCOMPRESSIBLE FLOW
NUCLEAR POWER PLANTS
STEAM GENERATORS
TURBULENT FLOW