Kazuya Tatsumi
Department of Mechanical Engineering and Science, Graduate School of Engineering
Kyoto University, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8540, Japan; Advanced Research Institute of Fluid Science and Engineering, Kyoto University
Hiroshi Iwai
Department of Mechanical Engineering, Department of Aeronautics and Astronautics, Kyoto University, Nishikyo-ku, Kyoto 615-8540, Japan; Kyoto University, Kyoto, 606-8501, JAPAN
Eng Chong Neo
Department of Mechanical Engineering Kyoto University, Kyoto 606-8501, Japan
K. Inaoka
Department of Mechanical Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
Kenjiro Suzuki
Department of Mechanical Engineering, Kyoto University, Kyoto; Department of Machinery and Control Systems, Shibaura Institute of Technology, 307 Fukasaku, Saitama, 337-8570, Japan
The present study presents the results of a three-component decomposition approach for the two- and three-dimensional computations of a turbulent flow over a backward-facing step. By this approach, effect of periodical fluctuation on the studied flow and temperature field incurred by the discrete counter-rotating vortices appearing in the free shear layer is discussed. Consequently, significance of the influence of this periodical fluctuation to the instantaneous fluid and heat transfer characteristics and eventually to the time mean momentum and heat transfer is demonstrated.