  We have developed a 3-D Eulerian hydrodynamics code to model sources of
gravitational radiation. The code is written in cylindrical coordinates
$(\varpi,z,\varphi)$ and has moving grids in the $\varpi$ and $z$-directions.
We use Newtonian gravity and calculate the gravitational radiation in the
quadrupole approximation. This code has been tested on a variety of problems to
verify its accuracy and stability, and the results of these tests are reported
here.
