Two-equation heat-transfer model for turbulent flows with separation and reattachment

Ken-Ichi Abe, Yasutaka Nagano, Tsuguo Kondoh

Research output: Contribution to journalArticle

Abstract

We propose a new two-equation heat-transfer model which is modified from the model developed by Nagano, Tagawa and Tsuji (Proc. ASME/JSME Thermal Eng. Joint Conf., 3 (1991), 233). The main improvement is made by introducing the Kolmogorov velocity scale, uε≡(νε) 1/4 , instead of the friction velocity uτ, to account for the wall-limiting behavior. After investigating the characteristics of various time scales for the heat-transfer model, we employed a composite time scale which gives weight to a shorter scale among the velocity- and temperature-field time scales. With these modifications, it is shown that the present model quite successfully predicts the turbulent heat transfer in a boundary layer subjected to sudden change of heat flux, and in a separating and reattaching flow downstream of a backward-facing step.

Original languageEnglish
Pages (from-to)223-230
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume60
Issue number573
Publication statusPublished - May 1994
Externally publishedYes

Fingerprint

turbulent flow
Turbulent flow
attachment
heat transfer
Heat transfer
turbulent heat transfer
backward facing steps
Heat flux
Boundary layers
Temperature distribution
Friction
heat flux
boundary layers
temperature distribution
friction
velocity distribution
Composite materials
composite materials

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Two-equation heat-transfer model for turbulent flows with separation and reattachment. / Abe, Ken-Ichi; Nagano, Yasutaka; Kondoh, Tsuguo.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 60, No. 573, 05.1994, p. 223-230.

Research output: Contribution to journalArticle

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