|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||A Sharp Interface Phase Field Method
||Alphonse Finel, Yann Le Bouar, Benoît Dabas
|On-Site Speaker (Planned)
Phase Field methods (PFM) are extensively used for modeling microstructures. The reason for this success is that, using simple symmetry arguments and the conserved/non-conserved character of the fields needed to describe the situation, it is easy to extend free energy functionals and kinetic equations to complex situations where different phenomena are coupled. However, as the fields are supposed to be continuous, the numerical grid spacing must be much smaller than the smallest internal length, i.e. the interfaces widths. This «diffuse interface» constraint limits drastically the overall accessible linear dimensions.
We propose a new PFM formulation, in which interface widths may be as small as the grid spacing, without any pinning when the interfaces move, allowing to multiply the linear dimensions by an order of magnitude. Also, to couple this «sharp interface» PFM to elastic fields, we propose a new elastic solver that efficiently treats strong elastic heterogeneities.
||Planned: Supplemental Proceedings volume