The parts list contains all structured Lagrange or unstructured volume parts in your model. Select one or more of these parts to create an object that can then be packed with SPH particles. You must enter a name for the new object to be created.
The images below show an example of a model with a projectile impacting a target. The target modeled with tetrahedral volume elements in the first image has been converted to an SPH object and packed with SPH nodes. This is shown in the second image.