Hi,

I would like to know if a type of software exists...

I would like the software to act as a virtual hull performance testing
tank. Something that can have a basic hull design, perhaps some kind
of CAD software, that allows the drawing to be submerged into a
virtual water depth, and display the effect to water that a travelling
hull would do.

Any ideas where I should be looking for such software?

Something to run on Linux is preferable, but will take any directions
at this stage.

Thanks