Experimental Study on Variations of Flow Fields around Artificial Fish Reefs Model Constituted with the Lattice Block (1st Report)

Variations of flow field around the Great-Reef type artificial fish reefs model constituted with the lattice block were examined in detail by wind tunnel testing. Mean velocity and turbulent intensity distributions were measured about the flow field where the artificial fish reefs model was set on the flat plate installed in the uniform flow. Based on this result, vortex flow, spreading of hydrauric shadow and streamline were determined. Flow visualization of flow fields was also attempted by the tuft method. From these experiments, it was comfirmed that present artificial fish reefs model had a sufficient biological function.