Numerical simulations of negatively buoyant jets in an immiscible fluid using the Particle Finite Element Method

M. Mier-Torrecilla*, A. Geyer, J. C. Phillips, S. R. Idelsohn, E. Onate

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)

Abstract

Negatively buoyant jets consist in a dense fluid injected vertically upward into a lighter ambient fluid. The numerical simulation of this kind of buoyancy-driven flows is challenging as it involves multiple fluids with different physical properties. In the case of immiscible fluids, it requires, in addition, to track the motion of the interface between fluids and accurately represent the discontinuities of the flow variables. In this paper, we investigate numerically the injection of a negatively buoyant jet into a homogenous immiscible ambient fluid using the Particle Finite Element Method and compare the two-dimensional numerical results with experiments on the injection of a jet of dyed water through a nozzle in the base of a cylindrical tank containing rapeseed oil. In both simulations and experiments, the fountain inlet flow velocity and nozzle diameter have been varied to cover a wide range of Froude Fr and Reynolds Re numbers ( 0.1?

Original languageEnglish
Pages (from-to)1016-1030
Number of pages15
JournalInternational Journal for Numerical Methods in Fluids
Volume69
Issue number5
DOIs
Publication statusPublished - 20 Jun 2012

Keywords

  • PFEM
  • negatively buoyant jets
  • HEIGHT
  • HOMOGENEOUS FLUID
  • interfacial tension
  • PLUMES
  • immiscible fluids
  • WEAK FOUNTAINS
  • fountain
  • REYNOLDS
  • TURBULENT FOUNTAINS
  • FREE-SURFACE FLOWS
  • particle finite element method
  • LAMINAR PLANE FOUNTAINS
  • MAGMA CHAMBERS

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