Abstract
The density change and the water particle motion in a two-layered water is investigated in a 2D wind flume with sloping bottom. In this study, spatial density profiles were obtained using multi-channel conductivity probes, and compared with the luminance distributions measured by digital video cameras for imaging techniques. In addition, water particle velocities were measured using particle image velocimetry (PIV) technique. The aspects of diffusion and advection of the mixture of the upper-layer and lower-layer water were well illustrated from the measured results obtained by the conductivity sensors arranged along the flume. The measurements using PIV were compared with the predictions of k-ε turbulent model. Although the flow and density fields were strongly affected by the internal seiche, the numerical results show good agreement with these experimental results.
