# Tonpilz Transducer in Water

## Defining the 2D Geometry

From the preprocessing environment of GiD, it is relatively simple to now add the water loading on the transducer.
Save the model in a new file using File | Save As.
Add the required points, lines, and surfaces, to create the water domain. The water domain has a radius of 56mm. Because the geometry of the transducer was created such that the center of the piston would be at the origin of the global coordinate system, the water domain is also centered at the origin. If needed, look in the GiD documentation about how to create an arc.

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