A102 河床波上の浮遊砂流れにおける乱れと流砂濃度のPIV・PTV計測

抄録

In the present study, we developed the discriminator PIV and PTV systems (D-PIV&PTV), in which fluid tracers and sediment particles were discriminated reasonably by their occupied particle sizes, and thus, the velocities of particles and fluid could be measured simultaneously. As the results, we have investigated experimentally the sediment effects on coherent motion of kolk-boil vortices in suspended sediment-laden flows over sand dunes by using these D-PIV&PTV.
In particular, it was found that the kolk-boil vortex has a significant relation with the local distribution of suspended sediments near the reattachment point behind the dune crest.