About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Revisiting the Stefan Problem for Accurate AM Modeling |
Author(s) |
Dilip Kumar Banerjee |
On-Site Speaker (Planned) |
Dilip Kumar Banerjee |
Abstract Scope |
The classical Stefan problem describes the evolution of the solid-liquid (S-L) boundary, which is important for accurate AM modeling and building a digital twin framework. In the classical approach, Fourier heat conduction equations are solved in both phases along with the specification of a Stefan condition. Commercial CFD software avoid explicit tracking of the S-L interface by implementing the Volume-of-Fluid (VOF) method. Phase field (PF) models represent S-L interface as a continuous transition layer with a PF variable. However, there may be inaccuracies in computed thermal fields using these approaches.
The present work is focused on determining errors in computed thermal fields. Toward this end, thermal profiles for a simple 1-D heat flow problem involving S-L phase transformation from commercial CFD software are compared with results from an analytical model and an equivalent integral expression. The influence of this work on UQ prediction in digital twin development will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Phase Transformations, Other |