Volume 102, Number 5, June 2013
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||24 June 2013|
Flow-induced traveling waves on solidification interfaces
Aix Marseille Université, CNRS, IRPHE UMR 7342 - 13384, Marseille, France, EU
Received: 20 March 2013
Accepted: 29 May 2013
We address the dynamics of the solid/liquid interface of a solidifying material when the liquid phase is flowing with respect to the solid phase. To visualize the interface and independently control both the flow and the solidification conditions, we use a thin sample filled with a transparent melt. Whereas this set-up involves no flow by itself, we link it to a thermosiphon which provides an external flow source for the liquid phase. We then evidence a new instability of solid/liquid interfaces which emerges from the coupling between solidification and flow. It is oscillatory and generates two kinds of traveling waves on the interfaces. Both waves periodically modify the growth conditions of the solid phase yielding bands of composition in the solidified material. This instability is expected to widely occur in freezing media due to the usual natural occurrence of thermal or thermosolutal convective flows in their liquid phase.
PACS: 47.20.Ma – Interfacial instabilities (e.g., Rayleigh-Taylor) / 47.20.Hw – Morphological instability; phase changes / 81.30.Fb – Solidification
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.