Abstract
A numerical model which had been already developed by authors for understanding a characteristic of turbidity flow induced by dumped sediment through a vertical pipe is improved by introducing a modified Smagorinsky turbulence model. According to comparison with a laboratory experimental results, calculated results reasonably agree with experimental ones. As a result of parametric analysis by the developed model, horizontal velocity and momentum of turbidity mass on the bottom can be controlled by initial sedimentation load. In addition, it is figured out that thickness of turbidity mass on the bottom can be controlled by the clearance between the vertical pipe and water bottom.
