抄録
Simultaneous measurements of velocity and scalar distribution in a turbulent jet were carried out by means of particle image velocimetry (PIV) and laser induced fluorescence(LIF). In order to clarify the turbulent transport-process of momentum and scalar, the turbulence characteristics are calculated based on the temporal-averaged data. Furthermore, the local instantaneous flux of scalar by a fine scale structure of the turbulence is discussed and compared with a couple of the subgrid scale models for the large eddy simulation.
