Abstract
This study mainly deals with characteristics of hydrodynamic forces on upwelling structures constructed on the sea floor with comparatively deep water depth, say about 200m. Two different configurations of upwelling structures, typically a vertical I-shape plate model and a V-shaped plate model in the horizontal plane, were used as a practical model. The numerical analysis based upon the modified three dimensional source distribution method was applied to examine the upwelling structures in a coexistent environment of wavea and currents. Experimental verifications for such a numerical study were also carried out. It can be seen that the predominant fluid force on a upwelling structure is an inertial force, and the remaining drag force is about 1/10 of the inertial force. In addition, under the wave and current coexistent environment, it is found out that the effective inertia coefficient (Cm) of the upwelling structure increases with decreasing of Uc/C (current velocity vs wave cerelity). Some empirical formula of the effective inertia coefficient are also presented.
