A three-component laser Doppler anemometer was used to measure the fully
developed, turbulent flow in a closed, symmetric, smooth-wall compound channel.
Measurements were made across one quadrant of the cross-section since the flow was
assumed symmetric. Measurements were made for a single channel Reynolds number.
All mean velocity components were calculated and are reported. The mean
velocity field results are in good agreement with results reported for similar geometries.
The vector plots and the axial vorticity distribution reveal the existence of secondary
flow cells in both the main channel and the flood plain. The maximum values of the
secondary velocities are at the comer region, on the interface between the main channel
and the flood plain. In this region the mean velocity gradients are large, indicating that
this might be an area of high turbulence production. The distributions of all Reynolds
stresses across the cross-section are reported. The Reynolds stress distributions show
peak values near the interface corner region and small values near the center-line and
on the axes of symn1etry of the channel. The turbulence kinetic energy distribution
verifies the existence of high turbulence energy fluid in the comer region.
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