Assessment of applicability of LES model for heat transfer deterioration

Nakatsuka, Toru  ; Yoshida, Hiroyuki  ; Takase, Kazuyuki

In the thermal hydraulic design of supercritical water-cooled reactor, it is required to establish a design technique which can precisely predict heat transfer deterioration of supercritical water as the core coolant. The mechanism of heat transfer deterioration has not been figured out yet. In the present study, results of preliminary surveys on several turbulence models are reported. Large eddy simulation shows the most promising results for predictions of the heat transfer deterioration with a high accuracy.