Reply To: Ansys AQWA: free flooded pipe,

[Shuangxing Du]

There is no need to use internal tank to define the water inside the floodable circular tube.

In your model, the equivalent volumetric dispalcement is the structure mass dividing the water density, which is 48e5/1025=4682 m^3.

It seems that the actual volumetric displacement result is questionable.  Please check (your project)\dp0\AQW\Analysis\Analysis.dat, which should be similar to 

(1)  in Data Category 2, TUBE elements instead of STUB elements (see 6.3. Element Topology Data Record) are defined.

(2) in Data Category 4,  TUBE geometry's diameter, thickness and indicator of floodable (=1) are defined properly. (8.3. Geometric Property Data Record)