Countercurrent gas-liquid flow in a PWR hot leg (Effects of channel shape and size)


Countercurrent gas-liquid flow in a PWR hot leg (Effects of channel shape and size)

Kinoshita, I.; Murase, M.; Utanohara, Y.; Lucas, D.; Vallée, C.; Tomiyama, A.

A numerical study is presented to examine the effects on countercurrent flow limitation (CCFL) of shape and size of hot leg models with rectangular cross-section. Using the CFD software FLUENT 6.3.26, numerical simulations were conducted for CCFL experiments in a 1/3 scale rectangular channel (HxW = 0.25x0.05 m2), and results were compared with CCFL data and simulation results in a 1/5 scale rectangular channel (HxW = 0.15x0.01 m2). Comparing CCFL characteristics in rectangular channels with those in circular channels, the hydraulic diameter was turned out to be a major factor of cross-section geometry influencing the CCFL characteristics in hot legs.

Keywords: PWR hot leg; countercurrent gas-liquid flow; CCFL; rectangular channel; numerical simulation

  • Contribution to proceedings
    Japan Society of Multiphase Flow (JSMF) Annual Meeting 2011, 06.-08.08.2011, Koto, Japan

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Publ.-Id: 15535