Interacting density fronts in saturated brines cooled from above

R. Ezraty*, S. M. Rubinstein, N. Lensky, E. Meiburg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

When a saturated brine layer is cooled from above, both a convective temperature front as well as a front of sedimenting salt crystals can form. We employ direct numerical simulations to investigate the evolution and interaction of these two density fronts. Depending on the ratio of the temperature front velocity and the crystal settling velocity, which is governed by a dimensionless parameter in the form of a Rayleigh number, we find that either two separate fronts exist for all times, two initially separate fronts combine into a single front after some time or a single front exists at all times. We furthermore propose approximate scaling laws for the propagation of the thermal and crystal fronts in each regime and compare them with the simulation data, with generally good agreement.

Original languageAmerican English
Article numberA5
JournalJournal of Fluid Mechanics
Volume975
DOIs
StatePublished - 15 Nov 2023

Bibliographical note

Publisher Copyright:
© The Author(s), 2023. Published by Cambridge University Press.

Keywords

  • Bénard convection
  • multiphase flow

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