A Phase Field Model to Describe the Behavior of Volcanic Crystals

ABSTRACT In this proceeding, a phase‐field model to describe the evolution of size, shape, and composition of volcanic crystals is introduced. It is built on top of an existing model for idealized spherical crystals but uses the phase‐field approach to investigate arbitrary initial shapes and considers the diffusion of diffusion elements as well as heat. Furthermore, it also takes the development of the dislocation density into account, which makes it possible to make predictions about the stability of the crystals. In this proceeding, the effects of different initial configurations and the behavior of the model under instability are investigated.