抄録
We have measured temperature and concentration fields over a two-dimensional hill in an attempt to elucidate important characteristics of the complex turbulent flow. On the leeward side of the hill, the turbulent intensities peak along the dividing stream line. In the separation bubble, the mean temperature stays relatively high, and decreases to the free-stream temperature level. Thus, there exists a second maximum intensity of temperature fluctuations aside from the peak in the vicinity of the wall. On the other hand, the mean concentration profiles of ethylene (C_2H_4) show almost uniform in the vertical direction up to the height of the crest of the hill. Thus, the turbulent flow field strongly affects the temperature and concentration fields in a quite different manner.
