# Thermodynamics of Non-equilibrium Diffuse-Interfaces in Mesoscale Phase Transformations

Source: [Thermodynamics of Non-equilibrium Diffuse-Interfaces in Mesoscale Phase Transformations](<https://www.sota2.com/research/paper/68fa43d01e209131ce90cb6e>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T04:30:47.784Z

Authors: Yue Li, Lei Wang, Junjie Li, Jincheng Wang, Zhijun Wang

Published: 2023-03-17T10:53:27.000Z

## Abstract

We present a new phase-field formulation for the non-equilibrium interface kinetics. The diffuse interface is considered an integral of numerous representative volume elements (RVEs), in which there is a two-phase mixture with two conserved and two non-conserved concentration fields. This particular way of separating concentration fields leads to two distinct dissipative processes besides the phase boundary migration, i.e., trans-sharp-interface diffusion between different phases within a single RVE and trans-diffuse-interface diffusion between different RVEs within a single phase. A two-part mechanism is proposed to balance the driving forces and energy dissipation for diffusionless and diffusional processes in RVEs. Moreover, the classical interface friction and solute drag can be recovered by integrating the diffuse interface. Compared with the sharp interface theory, the present diffuse interface can reproduce the atomic simulated partial-drag self-consistently in thermodynamics.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2303.09879>)

[PDF](<https://arxiv.org/pdf/2303.09879.pdf>)