Flow-driven pattern formation in the calcium-oxalate system

Bíborka Bohner, Balázs Endrodi, D. Horváth, Ágota Tóth

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The precipitation reaction of calcium oxalate is studied experimentally in the presence of spatial gradients by controlled flow of calcium into oxalate solution. The density difference between the reactants leads to strong convection in the form of a gravity current that drives the spatiotemporal pattern formation. The phase diagram of the system is constructed, the evolving precipitate patterns are analyzed and quantitatively characterized by their diameters and the average height of the gravity flow. The compact structures of calcium oxalate monohydrate produced at low flow rates are replaced by the thermodynamically unstable calcium oxalate dihydrate favored in the presence of a strong gravity current.

Original languageEnglish
Article number164504
JournalJournal of Chemical Physics
Volume144
Issue number16
DOIs
Publication statusPublished - Apr 28 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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