Traveling Waves Induced by Sweeping Flows on Solidification Interfaces
Materials Science
2019-03-28 v1 Soft Condensed Matter
Abstract
Solidification of alloys in a thermal gradient usually involves the generation of flows by thermal or thermosolutal convection. We experimentally study their effects on the dynamics of a solidification interface by inducing a controlled sweeping flow in a directional solidification device. Flow is induced in the sample from an external thermosiphon. Downstream inclination of microstructures and downstream sidebranch development are observed. However, the major outcome is the evidence of large scale travelling waves on the solidification interface. They are induced by the coupling between solidification and flow and yield repetitive striations of the solid phase. Two waves are observed and characterized.
Cite
@article{arxiv.1903.11333,
title = {Traveling Waves Induced by Sweeping Flows on Solidification Interfaces},
author = {Alain Pocheau and Tania Jiang and Marc Georgelin},
journal= {arXiv preprint arXiv:1903.11333},
year = {2019}
}