3D Phase-Field Simulations of Pattern Formation During Freeze Casting

3D Phase-Field Simulations of Pattern Formation During Freeze Casting

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 hier...

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Hauptverfasser: Ji, Kaihua, Yin, Kaiyang, Strutzenberg, Louise L, Trivedi, Rohit, Wegst, Ulrike G K, Karma, Alain
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Physics (General)
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creator Ji, Kaihua
Yin, Kaiyang
Strutzenberg, Louise L
Trivedi, Rohit
Wegst, Ulrike G K
Karma, Alain
description 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.
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Physics (General)
title 3D Phase-Field Simulations of Pattern Formation During Freeze Casting
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