This paper descries predictions of saline water current advancing into brackish lakes in series by means of laboratory tests and 3D computations. The numerical model was tuned through the comparison with results of the laboratory tests performed using a water tank which was made of acrylic acid resin composed of two rectangular model lakes connected with narrow channel. The present numerical model could reproduce reasonably the fundamental aspect of the flow b ( a) ehavior of the density current when we used a proper tuned vertical eddy viscosity coefficient. In order to control the behavior of advancing saline water, we tried to use a 1/4-sphere type block proposed by Komatsu et al. The experimental and numerical results showed that the blocks are effective to decelerate the density front and decrease the density of saline water near the bottom of the lake, thought the computations could not capture sufficiently the upwelling current triggered by the blocks.

Megumi Obata

Papers

Fundamental investigations on saline water current advansing into a brackish lake by laboratory tests and 3d computations

Some considerations on application of generalized momvable coordinate sytem to density mixing currents