Nucleation in Sheared Granular Matter.
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2018-02
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We present an experiment on crystallization of packings of macroscopic granular spheres. This system is often considered to be a model for thermally driven atomic or colloidal systems. Cyclically shearing a packing of frictional spheres, we observe a first order phase transition from a disordered to an ordered state. The ordered state consists of crystallites of mixed fcc and hcp symmetry that coexist with the amorphous bulk. The transition, initiated by homogeneous nucleation, overcomes a barrier at 64.5% volume fraction. Nucleation consists predominantly of the dissolving of small nuclei and the growth of nuclei that have reached a critical size of about ten spheres.
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Rietz, Frank, Charles Radin, Harry L Swinney and Matthias Schröter (2018). Nucleation in Sheared Granular Matter. Physical review letters, 120(5). p. 055701. 10.1103/physrevlett.120.055701 Retrieved from https://hdl.handle.net/10161/20169.
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Matthias Schroter
I am interested in (in order of appearance): Greek philosophy, pattern formation, minimal music, granular matter, meditation, X-ray tomography, machine learning, ....
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