Transient dynamics of a cellular front instability during directional solidification
- 27 December 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 71 (26) , 4397-4400
- https://doi.org/10.1103/physrevlett.71.4397
Abstract
We report the first systematic transient dynamics measurements of a cellular instability during directional solidification on a nematic-isotropic interface of the liquid crystal 8cB. The time evolution of the most unstable spatial mode of the interface is well described by a third-order Landau-amplitude equation, as anticipated theoretically. Instability growth rates and nonlinear cubic coefficients are measured as a function of pulling velocity and temperature gradient. The results are compared with theories of directional solidification.Keywords
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