About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Frontiers in Solidification Science VIII
|
Presentation Title |
3D Phase-field Simulations of Pattern Formation during Freeze Casting |
Author(s) |
Kaihua Ji, Kaiyang Yin, Louise L. Strutzenberg, Rohit Trivedi, Ulrike G.K. Wegst, Alain Karma |
On-Site Speaker (Planned) |
Alain Karma |
Abstract Scope |
We present the results of a combined experimental and phase-field modeling study of pattern formation during freeze casting. Those studies use unidirectional freezing of simple binary liquid mixtures of water and sugars (sucrose and trehalose) in a temperature gradient, which suffice to produce hierarchical templated structures similar to those observed in more complex multi-component freeze-cast systems including lamellae, undulated ridges, and more exotic “jellyfish-like” substructures. Multiscale 3D phase-field simulations reproduce remarkably well those structures quantitatively and identify key properties of the ice-water interface that control their formation. They further reveal that lamellae form as a result of a novel symmetry-breaking secondary instability of partially faceted cellular structures and pinpoint additional secondary instability mechanisms giving rise to smaller-scale substructures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Modeling and Simulation, Other |