Experimental visualization of shallow water waves around a model ship in circulating water channel

It is important to consider shallow water effect for design of ships, because there are several differences when the ship is sailing in shallow water and in deep water. Many studies have been done, however few experiments have been done because a special device is necessary to simulate the shallow water condition and visualize shallow water waves. In this study, a device for shallow water effect in a circulating water channel is developed. Experiments are carried out to study the performance of the device for shallow water effect. For these purposes, relationship between rotation of impeller and flow velocity and uniformity of flow velocity in the device should be investigated. Experimental visualizations of the shallow water wave using this device are carried out, and crest angles of the diverging wave are measured and discussed.