These animations are example simulations using DDFD as described in these two papers:
Dislocation-density kinematics: a simple evolution equation for dislocation density involving movement and tilting of dislocations,
A.H.W. Ngan,
MRS Commun. 7 (3), 583–590 (2017). (doi:10.1557/mrc.2017.66) (abstract)
An efficient and minimalist scheme for continuum dislocation dynamics,
Alireza Kalaei, Yang Xiang, and Alfonso H.W. Ngan,
Int. J. Plast. 158, 103433 (2022). (doi:10.1016/j.ijplas.2022.103433) (abstract)
Source code in Matlab can be requested via the following link.