Seaweed to dendrite transition in directional solidification

Nikolas Provatas, Quanyong Wang, Mikko Haataja, Martin Grant

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


We simulate directional solidification using a phase-field model solved with adaptive mesh refinement. For small surface tension anisotropy directed at 45° relative to the pulling direction we observe a crossover from a seaweed to a dendritic morphology as the thermal gradient is lowered, consistent with recent experimental findings. We show that the morphology of crystal structures can be unambiguously characterized through the local interface velocity distribution. We derive semiempirically an estimate for the crossover from seaweed to dendrite as a function of thermal gradient and pulling speed.

Original languageEnglish (US)
JournalPhysical review letters
Issue number15
StatePublished - 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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