A numerical model of two-dimensional wake and its application to the hanging aquaculture facilities

Abstract

To evaluate the hydraulic resistance behind bodies, a drag stress term included the drag coefficient was introduced into the depth-integrated Reynolds equations. The applicability and problems of the model were discussed through various numerical experiments where the analytical solutions exist. For a single body, the results of numerical solutions were good agreement with those of analytical solutions in all cases. If the drag coefficient and the eddy viscosity are precisely decided, the numerical solutions behind a row of bodies can be efficiently used in the real situations. The model was also applied to a field. The velocity decreased around down-stream area of the facilities, while it increased in the other region. The water elevation decreased during the flood flow while it increased during the ebb flow.