Numerical analysis of deterioration in heat transfer to supercritical water

Seiichi Koshizuka, Naoki Takano, Yoshiaki Oka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Deterioration in heat transfer to supercritical water is numerically studied using a k-ε model. Physical properties are treated as variables and calculated from the steam table library. The numerical result agrees with the experimental data of Yamagata et al. 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.

Original languageEnglish
Pages (from-to)2497-2503
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume60
Issue number575
Publication statusPublished - 1994 Jul
Externally publishedYes

Fingerprint

deterioration
numerical analysis
Deterioration
Numerical analysis
flow velocity
heat transfer
Heat transfer
Flow rate
water
Water
turbulent heat transfer
fluid dynamics
Fluid dynamics
Velocity distribution
Buoyancy
buoyancy
Flow velocity
steam
hydraulics
Heat flux

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Numerical analysis of deterioration in heat transfer to supercritical water. / Koshizuka, Seiichi; Takano, Naoki; Oka, Yoshiaki.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 60, No. 575, 07.1994, p. 2497-2503.

Research output: Contribution to journalArticle

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