When developing constitutive models, it is crucial to run the model under a variety of standard (and some nonstandard) homogeneous deformations. To do this, you must first describe the motion mathematically. As indicated in , a good way to do that is to give the deformation gradient tensor, F. The component matrix [F] contains the deformed edge vectors of an initially unit cube, making this a very easy to way to prescribe deformations.
Here is a brief tutorial on making a movie in visit for selected portion of your simulation domain. I used sphere to represent the particles, but you do not have any restrictipn on how to show your particles. click visit_movie for the tutorial.