Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part II : URANS CFD Simulation

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概要

• 論文の詳細を見る

• In Part II, we described the unsteady flow simulation and proposed a modification of a traditional turbulence flow model. Computational fluid dynamics (CFD) simulations of an isothermal, fully periodic flow across a tube bundle using unsteady Reynolds averaged Navier-Stokes (URANS) equations, with turbulence models such as the Reynolds stress model (RSM) were investigated at a Reynolds number of 1.8×104, based on the tube diameter and inlet velocity. As noted in Part I, CFD simulation and experimental results were compared at five positions along (x,y) coordinates. The steady RANS simulation showed that four diverse turbulence models were efficient for predicting the Reynolds stresses, and generally, SRANS results were marginal to poor, using a consistent evaluation terminology. In the URANS simulation, we modeled the turbulent flow field in a manner similar to the approach used for large eddy simulation (LES). The time-dependent URANS results showed that the simulation reproduces the dynamic stability as characterized by transverse oscillatory flow structures in the near-wake region. In particular, the inclusion of terms accounting for the time scales associated with the production range and dissipation rate of turbulence generates unsteady statistics of the mean and fluctuation flow. In spite of this, the model implemented produces better agreement with a benchmark data set and is thus recommended.

• 一般社団法人 日本原子力学会の論文
• 2008-12-01

著者

• Tokuhiro Akira

  Nuclear Program Department Of Mechanical Engineering University Of Idaho

• Tokuhiro Akira

  Nuclear Engineering Department University Of Missouri-rolla

• RIDLUAN Artit

  Nuclear Program, Department of Mechanical Engineering, University of Idaho

• Ridluan Artit

  Nuclear Program Department Of Mechanical Engineering University Of Idaho

関連論文

• Status of Research and Development of the Lead-Alloy-Cooled Fast Reactor
• Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part I : SRANS CFD Simulation
• Benchmark Simulation of Turbulent Flow through a Staggered Tube Bundle to Support CFD as a Reactor Design Tool. Part II : URANS CFD Simulation

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