ABSTRACT
ABSTRACT: Velocity measurements were conducted of a re-circulating flow in a large flume on a smooth bed for three different water depths. The experimental results show that the horizontal turbulence of the flow as well as the reattachment length and the re-circulating flow rate are affected by the bed-friction effect in a similar manner as previous experiments conducted in a small flume of roughened bed. However, the velocity profile in the wake region is different from the flow on the roughen bed. This conclusion is consistent with the recent tracer studies of the flow in the same large flume by Liu (2004). The present velocity measurements and the tracer measurements of Liu (2004) have provided a complementary set of data for the development of Large Eddy Simulation model of shallow turbulent flow.
