Hello,
All the openings are located below the draught and submerged by seawater, the ship was built with Rhinoceros software and then imported into DesigModeler for editing, I didn't find a way to change the surface type of the surface body from “Program Control” to “Non-Diffractive”. I did not find the option to change the surface type of the surface body from “Program Control” to “Non-Diffractive”, and the draft position of the ship is shown in the figure.
Since my ultimate goal is to study the effect of different openings (area of the opening and shape of the opening) on the cable tension of the mooring system, the inside of the ship and the seawater need to be kept through, and the internal fluid and the external seawater area will flow with each other, so I can't use the internal tanks to represent the submerged volume.