- 著者
-
安倍 賢一
長野 靖尚
近藤 継男
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.60, no.573, pp.1743-1750, 1994-05-25
- 被引用文献数
-
3
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, u_ε≡(νε)^<1/4>, instead of the friction velocity u_τ, 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.