Three-dimensional computations of solution hydrodynamics during the growth of potassium dihydrogen phosphate II. Spin down

Andrew Yeckel, Yuming Zhou, Michael Dennis, Jeffrey J. Derby

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37 Scopus citations

Abstract

Three-dimensional, time-dependent flows that occur in the Lawrence Livermore National Laboratory system for rapid growth of potassium dihydrogen phosphate (KDP) crystals from solution are studied using massively parallel finite element computations. The simulation reveals that excellent global mixing occurs during the spin-down phase of a time-dependent stirring cycle. The large scale fluid motions in the radial and axial directions that promote mixing are caused primarily by effects of platform geometry, but are augmented to some degree by the intrinsic tendency of a decelerating rotational flow to reverse direction within Ekman layers that form at the boundaries. Along with Part I of this work [Y. Zhou, J.J. Derby, J. Crystal Growth 180 (1997) 497], which emphasized spin up and steady rotation, significant advances have been made in our understanding of hydrodynamic phenomena in this system.

Original languageEnglish (US)
Pages (from-to)206-224
Number of pages19
JournalJournal of Crystal Growth
Volume191
Issue number1-2
DOIs
StatePublished - Jul 1 1998

Keywords

  • Finite element model
  • Fluid flow
  • Solution growth

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