Fundamental Study on Three-dimensional Display Using Water

Holograms and computer graphics (CG) are used for presenting three-dimensional shapes. However, these are based on video technology and cannot actually form an object. Therefore, we develop a display device using a water column formed by water jet. By using a liquid, the displayed object can be changed to an arbitrary shape and one can touch those objects. By increasing the number of nozzles, the device can reproduce the object in details. However, the number of nozzles that can be used depends on the performance of the pump. If the outflow shape can be changed for each nozzle, various displays can be made. In this paper, we numerically analyze the shape of the outflow formed by the water jet of the nozzle.