Effect of particle inertia in particulate density currents

Mariano I. Cantero, S. Balachandar, Marcelo H. García, James P. Ferry

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In this work we address the effect of particle inertia in particulate density currents. First we introduce a novel two-fluid model based on the equilibrium Eulerian approach [6]. The resulting model captures very important physics of two-phase flows, such as preferential concentration and migration of particles down turbulence gradients (turbophoresis), which modify substantially the structure and dynamics of the flow.We solve the mathematical model with a highly accurate spectral code, capturing all the length and time scales of the flow. We present two-dimensional simulations in planar configuration for Grashof Gr = 1.5 × 106. In the simulation results we observe the particles to migrate from the core of Kelvin-Helmholtz vortices shed from the front of the current and to accumulate in the current head, which affects the propagation speed of the front.

Original languageEnglish (US)
Title of host publicationIUTAM Symposium on Computational Approaches to Multiphase Flow
PublisherKluwer Academic Publishers
Pages393-402
Number of pages10
ISBN (Print)9781402049767
DOIs
StatePublished - Jan 1 2006

Publication series

NameFluid Mechanics and its Applications
Volume81
ISSN (Print)0926-5112

Keywords

  • Density currents
  • Equilibrium eulerian model
  • Gravity currents
  • Spectral methods
  • Two-fluid model
  • Two-phase flow

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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