TY - JOUR
T1 - Two-Equation Heat-Transfer Model for Turbulent Flows with Separation and Reattachment
AU - Abe, Ken Ichi
AU - Nagano, Yasutaka
AU - Kondoh, Tsuguo
PY - 1994
Y1 - 1994
N2 - 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≡(vε)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.
AB - 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≡(vε)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.
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U2 - 10.1299/kikaib.60.1743
DO - 10.1299/kikaib.60.1743
M3 - Article
AN - SCOPUS:85007691237
SN - 0387-5016
VL - 60
SP - 1743
EP - 1750
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
IS - 573
ER -