Abstract
A three-dimensional numerical wave tank ‘CADMAS-SURF/3D’ was improved so as to deal with the interaction between waves and movable objects using a volume-force type of immersed boundary method. The improved ‘CADMAS-SURF/3D’ was applied to enforced moving object tests in order to verify the validity and utility of the model. In a wavemaker test, regular waves were generated with a vertical plate in piston-type and flap-type motions. As a result, a reasonable agreement between numerical and theoretical results based on the small amplitude wave theory was found in terms of water surface fluctuation and flow velocity. From the dam-break test, it was demonstrated that the improved ‘CADMAS-SURF/3D’ was able to predict water motion accurately by considering the rapid upward movement of a gate.
