Do you need the center of gravity of the fluid or the structure?

The structure can be done easily using the geometry.

The fluid also can be treated as geometry but that depends whether it is internal or external flow.

We need the Center of Gravity of the fluid. Infact Sloshing Fluid.

We tried every possible options in Ensight. But nothing turned out to be fruitful.

Dear Aziz

We found out a way to to define the CoG in the same way you told. But the calculation time of the solver was increased drastically. We are exploring the other options to bring out the result without compromise on solver time. 

Geen