Precipitative growth templated by a fluid jet

David A. Stone, Braddon Lewellyn, James C. Baygents, Raymond E. Goldstein

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28 Scopus citations

Abstract

Tubular growth by chemical precipitation at the interface between two fluids, a jet and its surroundings, underlies the development of such important structures as chimneys at hydrothermal vents. This growth is associated with strong thermal and/or solute gradients localized at those interfaces, and these gradients, in turn, often produce radial compositional stratification of the resulting tube wall. A fundamental question underlying these processes is how the interplay between diffusion, advection, and precipitation determines the elongation rate of the tubes. Here we report experimental and theoretical results that reveal a regime in which there exists a new scaling law for tube growth. The model system studied consists of a jet of aqueous ammonia injected into a ferrous sulfate solution, precipitating iron hydroxides with varying oxidation states at the jet boundary. Despite the complex chemistry and dynamics underlying the precipitation, the tube growth exhibits a strikingly simple scaling form, with characteristic lengths and times increasing linearly with the mean velocity of the jet. These observations follow from a kinetic model of advection-dominated flows.

Original languageEnglish (US)
Pages (from-to)10916-10919
Number of pages4
JournalLangmuir
Volume21
Issue number24
DOIs
StatePublished - Nov 22 2005

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Stone, D. A., Lewellyn, B., Baygents, J. C., & Goldstein, R. E. (2005). Precipitative growth templated by a fluid jet. Langmuir, 21(24), 10916-10919. https://doi.org/10.1021/la052064z