Numerical Analysis of Deterioration in Heat Transfer to Supercritical Water

Seiichi Koshizuka, Naoki Takano, Yoshiaki Oka

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Deterioration in heat transfer to supercritical water is numerically studied using a k-ε model. Physical properties are treated as variables and calculatd from the steam table library. The numerical result agrees with the experimental data of Yamagata et al. [Trans. JSME, 38–2 (1972)] It is found that heat-transfer deterioration is caused by two mechanisms depending on the flow rate. In the case of large flow rate, heat transfer is reduced near the wall where the fluid properties are locally changed due to the heat flux. In the case of small flow rate, buoyancy force flattens the flow velocity distribution and the turbulent heat transfer is decreased. The present analysis shows that supercritical thermal hydraulics can be explained by the single-phase turbulent fluid dynamics.

本文言語English
ページ(範囲)2497-2503
ページ数7
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series B
60
575
DOI
出版ステータスPublished - 1994 1 1
外部発表はい

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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