Simulation of flow in a pulsed-jet mixer using a volume of fluid model

D. Eldin, S. Parks, C. Petty, A. Bénard

Research output: Contribution to journalArticle

Abstract

Pulsed-jet mixers (PJM) are often used to suspend a solid phase in a liquid phase within very large tanks. In this study, a commercial CFD code (Fluent 6.0) is used to simulate the axisymmetric flow field induced by a PJM symmetrically situated in a cylindrical tank. The simulation uses a volume-of-fluid model for an air/water system with a standard k-ε model for the Reynolds stress. A large-scale periodic recirculation zone is established within the tank and provides a means to suspend solid particles. Particle trajectory calculations are used to identify potential regions of high wear on the bottom of the tank and within the jet nozzle. The simulation supports the conclusion that a PJM should be able to suspend 100-micron diameter particles with a density three times larger than water. However, under the same operating conditions, 500-micron diameter particles with densities equal to or larger than 3000 kg/m 3 will settle to the bottom of the tank.

LanguageEnglish (US)
Pages297-306
Number of pages10
JournalAdvances in Fluid Mechanics
Volume40
StatePublished - 2004

Profile

Fluids
fluids
cylindrical tanks
jet nozzles
axisymmetric flow
simulation
particle trajectories
Reynolds stress
charge flow devices
water
solid phases
flow distribution
liquid phases
Water
Nozzles
Flow fields
Computational fluid dynamics
air
Trajectories
Wear of materials

Keywords

  • Discrete phase model
  • Mixing
  • Pulsed-jet mixer
  • Solid/liquid suspension
  • Volume-of-fluid model

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Simulation of flow in a pulsed-jet mixer using a volume of fluid model. / Eldin, D.; Parks, S.; Petty, C.; Bénard, A.

In: Advances in Fluid Mechanics, Vol. 40, 2004, p. 297-306.

Research output: Contribution to journalArticle

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