Flow visualization and preliminary measurements of a confined jet with andwithout target

Flow visualization using smoke in a confined jet with and without a target has been investigated in the paper. The results indicated that there are fl ow oscillations in the confined jet with and without the target. The result s also confirm the existence of re-circulation flow when the flow hit the b ack wall and causing the mean velocity profiles did not reach the zero valu es at the far end of transverse locations. The flow visualization provides useful qualitative information about the flow physic of the fluidic flowmet er. (C) 2000 Elsevier Science Ltd.