| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Algorithm Development in Materials Science and Engineering
|
| Presentation Title |
A Recursive Grain Remapping Scheme for Irregular Morphologies in Phase-Field Models |
| Author(s) |
Alexander F. Chadwick, Peter W Voorhees |
| On-Site Speaker (Planned) |
Alexander F. Chadwick |
| Abstract Scope |
The multi-order parameter phase-field model (PFM) is a popular approach for simulating microstructural evolution in polycrystalline materials. However, computational resources limit the number of order parameters that can be employed, which reduces the number of crystallographic orientations and causes grains in the same order parameter to merge into one feature. Grain remapping eliminates these issues by dynamically assigning features to order parameters throughout the simulation. We present a remapping scheme that recursively decomposes grains into binary trees of axis-aligned bounding boxes (AABBs) while adding minimal overhead to existing codes, even with adaptive time stepping. As we increase the recursion depth, we obtain approximately conformal representations of grains that are efficiently tested for intersection. We demonstrate the scheme in a PFM of additive manufacturing, where grains have long columnar shapes with nonconvex features. We find that memory consumption is reduced by at least fourfold compared to bounding sphere schemes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Additive Manufacturing, |