| 1 | LABORATORY MEASUREMENTS IN SINE-GENERATED MEANDERING CHANNELS显示文摘The patterns (In flow plan) of rough turbulent steady flows in sine-generated meandering streams are investigated experimentally. The flow cross-section is rectangular, the flow width is uniform, the channel bed is flat; the plan shape is sine-generated. In contrast to previous works, where the computed flow patterns were of the same character, irrespective of the sinuosity of the channel, it is found, on the basis of present experiments, that every different Plan geometry of a meandering flow has its own flow picture. In the case of 'small' sinuosity, the flow convectively accelerates at the inner bank between the crossover-and apexsections; if, however, the sinuosity is 'large', the now convectively decelerates in the same region. The convergence-divergence areas (in flow Plan) of the present flows are in coincidence with the location of erosion-deposition zones in meandering streams, confirming that the convective behaviour of the vertically-averaged flow alone is sufficient to induce the bed and bank deformation. | A. M. Ferreira da SILVA and M. S YALIN (1 Research Hydraulic Engineer, Hydraulics Laboratory, Waterways Experiment Station, U. S. Army Corps of Engineers, Vicksburg, Mississippi. 2 Emeritus Professor, Department of Civil Engineering, Queen’s University, K | 1997 | International Journal of Sediment Research1997，12，1： | 2 |
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