Numerical modeling of diffusion-controlled phase transformation using the Darken method: Application to the dissolution/precipitation processes in materials

Many material phase transformations are controlled by mass transport induced diffusion. To better understand such transformations, numerous modeling strategies at the scale of moving interfaces exist, with their strengths and weaknesses. Phase-field approaches based on diffuse that do not require any interface tracking, as opposed to those fixed-grid sharp tracking. In case binary two-phase systems, in this paper we address key point balance equation involving a concentration jump, which determines velocity. We propose unique diffusion for both phases interface, component’s chemical potentials continuous through smooth volume-of-fluid representation. This model is achieved framework Darken method, involves intrinsic components drift velocity all compounds subjected. shown be displacement well. methodology verified 1D 3D dissolution/precipitation problems has first-order spatial convergence. The simulations precipitation dissolution processes more complex microstructures clearly show bifurcation particle morphology from initial spherical shape when edges each interact other. An extension potential mechanical driving forces should make it possible deal mechano-chemical coupling transport.