Non-isothermal diffuse interface model for phase transition and interface evolution
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913970338660352 |
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| author | Liu, Chun Sulzbach, Jan-Eric Wang, Yiwei |
| author_facet | Liu, Chun Sulzbach, Jan-Eric Wang, Yiwei |
| contents | In this paper, we derive a thermodynamically consistent non-isothermal diffuse interface model for phase transition and interface evolution involving heat transfer. This model is constructed by integrating concepts from classical irreversible thermodynamics with the energetic variational approach. By making specific assumptions about the kinematics of the temperature, we derive a non-isothermal Allen-Cahn equation. Through both asymptotic analysis and numerical simulations, we demonstrate that in the sharp interface limit, the non-isothermal Allen-Cahn equation converges to a two-phase nonlinear Stefan type problem, under a certain scale of the melting/freezing energy. In this regime, the motion of the liquid-solid interface and the temperature interface coincide and are governed by the mean curvature, at least for a short time. The result provides a justification for the classical Stefan problem within a certain physical regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09749 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-isothermal diffuse interface model for phase transition and interface evolution Liu, Chun Sulzbach, Jan-Eric Wang, Yiwei Analysis of PDEs Numerical Analysis In this paper, we derive a thermodynamically consistent non-isothermal diffuse interface model for phase transition and interface evolution involving heat transfer. This model is constructed by integrating concepts from classical irreversible thermodynamics with the energetic variational approach. By making specific assumptions about the kinematics of the temperature, we derive a non-isothermal Allen-Cahn equation. Through both asymptotic analysis and numerical simulations, we demonstrate that in the sharp interface limit, the non-isothermal Allen-Cahn equation converges to a two-phase nonlinear Stefan type problem, under a certain scale of the melting/freezing energy. In this regime, the motion of the liquid-solid interface and the temperature interface coincide and are governed by the mean curvature, at least for a short time. The result provides a justification for the classical Stefan problem within a certain physical regime. |
| title | Non-isothermal diffuse interface model for phase transition and interface evolution |
| topic | Analysis of PDEs Numerical Analysis |
| url | https://arxiv.org/abs/2408.09749 |