抄録
Processes of forming an organized turbulent thermal plume are investigated in unstable stratified and in combined stably and unstably stratified turbulent flows between parallel flat plates by conditional sampling measurement, in which temperature fluctuation near the wall is used as the detecting signal. The turbulent thermal plume is found to form in an unstable region of both combined and unstable stratified flows. The width of turbulent thermal plume increases downstream in developing unstablystratified turbulent flow. In combined stratified flow, however, development of the thermal plume is suppressed because the stably stratified flow existed over the unstable flow.
