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Title: Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures

Abstract

Dilute gas-particle mixtures in which the particles are carried by the turbulent fluid are found in various geophysical contexts, from cold snow avalanches to hot pyroclastic density currents. Though previous studies suggest that such mixtures have maximum particle concentrations of a few volume percent, the dependence of this maximum concentration on the Reynolds number is unclear. We addressed this issue through laboratory experiments in a vertical pipe, where dilute gas-particle mixtures were created by injecting a turbulent air flow from below. Nearly monodisperse mixtures of glass beads of different grain sizes (77 to 1,550 μm) were used with varying bulk concentrations from 0.025 to 8 vol. %. To create quasi-static mixtures, the mean air velocity matched the terminal settling velocity for the grain sizes investigated. The maximum Reynolds numbers of the mixtures were ~104–106. The air pressure indicated full support of the particle weight at concentrations down to 0.025 vol. %. Above a critical particle concentration, at which all the particles were suspended, subsequent additional particles were not maintained in the mixture and led to the formation of clusters that settled downward in the pipe to form a dense fluidized bed. Maximum mean particle concentrations of the dilute mixtures increased frommore » ~1 to ~2.8 vol. % and reached a plateau at increasing mixture Reynolds number. These results give insights into the maximum particle concentrations of geophysical turbulent gas-particle mixtures and may serve to constrain observations as well as the input and output data of models.« less

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2]
  1. Univ. Clermont Auvergne, Clermont-Ferrand (France)
  2. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1479401
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Solid Earth
Additional Journal Information:
Journal Volume: 123; Journal Issue: 5; Journal ID: ISSN 2169-9313
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Weit, A., Roche, O., Dubois, T., and Manga, M. Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures. United States: N. p., 2018. Web. doi:10.1029/2018JB015530.
Weit, A., Roche, O., Dubois, T., & Manga, M. Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures. United States. doi:https://doi.org/10.1029/2018JB015530
Weit, A., Roche, O., Dubois, T., and Manga, M. Tue . "Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures". United States. doi:https://doi.org/10.1029/2018JB015530. https://www.osti.gov/servlets/purl/1479401.
@article{osti_1479401,
title = {Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures},
author = {Weit, A. and Roche, O. and Dubois, T. and Manga, M.},
abstractNote = {Dilute gas-particle mixtures in which the particles are carried by the turbulent fluid are found in various geophysical contexts, from cold snow avalanches to hot pyroclastic density currents. Though previous studies suggest that such mixtures have maximum particle concentrations of a few volume percent, the dependence of this maximum concentration on the Reynolds number is unclear. We addressed this issue through laboratory experiments in a vertical pipe, where dilute gas-particle mixtures were created by injecting a turbulent air flow from below. Nearly monodisperse mixtures of glass beads of different grain sizes (77 to 1,550 μm) were used with varying bulk concentrations from 0.025 to 8 vol. %. To create quasi-static mixtures, the mean air velocity matched the terminal settling velocity for the grain sizes investigated. The maximum Reynolds numbers of the mixtures were ~104–106. The air pressure indicated full support of the particle weight at concentrations down to 0.025 vol. %. Above a critical particle concentration, at which all the particles were suspended, subsequent additional particles were not maintained in the mixture and led to the formation of clusters that settled downward in the pipe to form a dense fluidized bed. Maximum mean particle concentrations of the dilute mixtures increased from ~1 to ~2.8 vol. % and reached a plateau at increasing mixture Reynolds number. These results give insights into the maximum particle concentrations of geophysical turbulent gas-particle mixtures and may serve to constrain observations as well as the input and output data of models.},
doi = {10.1029/2018JB015530},
journal = {Journal of Geophysical Research. Solid Earth},
number = 5,
volume = 123,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
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Cited by: 3 works
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Figures / Tables:

Figure 1 Figure 1: (a) Sketch of the experimental device consisting of a vertical perspex transparent cylinder, an air supply system from below, a system to inject the particles, pressure sensors ($P$) along the side of the cylinder, and a cap with a mesh and a propeller to keep the particles insidemore » the pipe; the mean air flow velocity ($U$) is set equal to the settling velocity ($U_t$) of the particles. (b) Theoretical turbulent mean velocity profile for pure air flow for all investigated grain sizes (see supporting information).« less

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Works referenced in this record:

Saharan dust storms: nature and consequences
journal, December 2001


Enhanced Mobility in Concentrated Pyroclastic Density Currents: An Examination of a Self-Fluidization Mechanism
journal, January 2018

  • Breard, Eric C. P.; Dufek, Josef; Lube, Gert
  • Geophysical Research Letters, Vol. 45, Issue 2
  • DOI: 10.1002/2017GL075759

On the dynamics of volcanic columns: A comparison of field data with a new model of negatively buoyant jets
journal, November 2008


Ash production and dispersal from sustained low-intensity Mono-Inyo eruptions
journal, August 2016

  • Black, Benjamin A.; Manga, Michael; Andrews, Benjamin
  • Bulletin of Volcanology, Vol. 78, Issue 8
  • DOI: 10.1007/s00445-016-1053-0

Eine neue Bestimmung der Moleküldimensionen
journal, January 1906


Heavy Particle Concentration in Turbulence at Dissipative and Inertial Scales
journal, February 2007


Gas-particle two-phase turbulent flow in a vertical duct
journal, November 1995


A new view of the dynamics, stability and longevity of volcanic clouds
journal, April 2012


A review on East Asian dust storm climate, modelling and monitoring
journal, July 2006


Effect of particle volume fraction on the settling velocity of volcanic ash particles: insights from joint experimental and numerical simulations
journal, January 2017

  • Del Bello, Elisabetta; Taddeucci, Jacopo; de’ Michieli Vitturi, Mattia
  • Scientific Reports, Vol. 7, Issue 1
  • DOI: 10.1038/srep39620

LDV measurements of an air–-solid two-phase flow in a horizontal pipe
journal, July 1982


Improvement of EMMS drag model for heterogeneous gas–solid flows based on cluster modeling
journal, February 2016


The Clustering Instability in Rapid Granular and Gas-Solid Flows
journal, January 2017


Multiphase-flow numerical modeling of the 18 May 1980 lateral blast at Mount St. Helens, USA
journal, June 2011

  • Ongaro, T. Esposti; Widiwijayanti, C.; Clarke, A. B.
  • Geology, Vol. 39, Issue 6
  • DOI: 10.1130/G31865.1

On the motion of particles in turbulent duct flows
journal, April 1982


Pyroclastic flow hazard assessment at Vesuvius (Italy) by using numerical modeling. II. Analysis of flow variables
journal, May 2002


Preferential concentration of heavy particles in a turbulent channel flow
journal, November 1994

  • Fessler, John R.; Kulick, Jonathan D.; Eaton, John K.
  • Physics of Fluids, Vol. 6, Issue 11
  • DOI: 10.1063/1.868445

Towards a universal criteria for turbulence suppression in dilute turbidity currents with non-cohesive sediments: CRITERIA FOR TURBULENCE SUPPRESSION
journal, July 2012

  • Cantero, Mariano I.; Shringarpure, Mrugesh; Balachandar, S.
  • Geophysical Research Letters, Vol. 39, Issue 14
  • DOI: 10.1029/2012GL052514

Suspended load and bed-load transport of particle-laden gravity currents: the role of particle–bed interaction
journal, February 2007


The Viscosity of Concentrated Suspensions and Solutions
journal, April 1952

  • Brinkman, H. C.
  • The Journal of Chemical Physics, Vol. 20, Issue 4
  • DOI: 10.1063/1.1700493

Addressing complexity in laboratory experiments: the scaling of dilute multiphase flows in magmatic systems
journal, March 2005

  • Burgisser, Alain; Bergantz, George W.; Breidenthal, Robert E.
  • Journal of Volcanology and Geothermal Research, Vol. 141, Issue 3-4
  • DOI: 10.1016/j.jvolgeores.2004.11.001

The Fluid Mechanics of Pyroclastic Density Currents
journal, January 2016


Are eruptions from linear fissures and caldera ring dykes more likely to produce pyroclastic flows?
journal, November 2016


High speed imaging of particle flow fields in CFB risers
journal, July 2013


Geological implications and applications of high-velocity two-phase flow experiments
journal, May 1993

  • Anilkumar, A. V.; Sparks, R. S. J.; Sturtevant, B.
  • Journal of Volcanology and Geothermal Research, Vol. 56, Issue 1-2
  • DOI: 10.1016/0377-0273(93)90056-W

Solids concentration in the fully developed region of circulating fluidized bed downers
journal, April 2008


Coherent clusters of inertial particles in homogeneous turbulence
journal, November 2017

  • Baker, Lucia; Frankel, Ari; Mani, Ali
  • Journal of Fluid Mechanics, Vol. 833
  • DOI: 10.1017/jfm.2017.700

Depressurization of fine powders in a shock tube and dynamics of fragmented magma in volcanic conduits
journal, November 2002


Impact zone dynamics of dilute mono- and polydisperse jets and their implications for the initial conditions of pyroclastic density currents
journal, September 2017

  • Sweeney, Matthew R.; Valentine, Greg A.
  • Physics of Fluids, Vol. 29, Issue 9
  • DOI: 10.1063/1.5004197

A comparison of powder-snow avalanches at Vallée de la Sionne, Switzerland, with plume theories
journal, January 2007


The role of gravitational instabilities in deposition of volcanic ash
journal, March 2015

  • Manzella, Irene; Bonadonna, Costanza; Phillips, Jeremy C.
  • Geology, Vol. 43, Issue 3
  • DOI: 10.1130/G36252.1

The rheology of hard sphere suspensions at arbitrary volume fractions: An improved differential viscosity model
journal, January 2009

  • Mendoza, Carlos I.; Santamaría-Holek, I.
  • The Journal of Chemical Physics, Vol. 130, Issue 4
  • DOI: 10.1063/1.3063120

Role of pore pressure gradients in sustaining frontal particle entrainment in eruption currents: The case of powder snow avalanches
journal, January 2011

  • Louge, M. Y.; Carroll, C. S.; Turnbull, B.
  • Journal of Geophysical Research, Vol. 116, Issue F4
  • DOI: 10.1029/2011JF002065

Coupling of turbulent and non-turbulent flow regimes within pyroclastic density currents
journal, September 2016

  • Breard, Eric C. P.; Lube, Gert; Jones, Jim R.
  • Nature Geoscience, Vol. 9, Issue 10
  • DOI: 10.1038/ngeo2794

Emplacement of massive turbidites linked to extinction of turbulence in turbidity currents
journal, November 2011

  • Cantero, Mariano I.; Cantelli, Alessandro; Pirmez, Carlos
  • Nature Geoscience, Vol. 5, Issue 1
  • DOI: 10.1038/ngeo1320

Experimental study of turbulence, sedimentation, and coignimbrite mass partitioning in dilute pyroclastic density currents
journal, May 2012


The dynamics of surges in the 3 February 2015 avalanches in Vallée de la Sionne: DYNAMICS OF SURGES IN SNOW AVALANCHES
journal, November 2016

  • Köhler, A.; McElwaine, J. N.; Sovilla, B.
  • Journal of Geophysical Research: Earth Surface, Vol. 121, Issue 11
  • DOI: 10.1002/2016JF003887

Synthesizing large-scale pyroclastic flows: Experimental design, scaling, and first results from PELE: Large-scale PDC experiments
journal, March 2015

  • Lube, G.; Breard, E. C. P.; Cronin, S. J.
  • Journal of Geophysical Research: Solid Earth, Vol. 120, Issue 3
  • DOI: 10.1002/2014JB011666

Compressible Flow Phenomena at Inception of Lateral Density Currents Fed by Collapsing Gas-Particle Mixtures
journal, February 2018

  • Valentine, Greg A.; Sweeney, Matthew R.
  • Journal of Geophysical Research: Solid Earth, Vol. 123, Issue 2
  • DOI: 10.1002/2017JB015129

    Works referencing / citing this record:

    The Permeability of Volcanic Mixtures—Implications for Pyroclastic Currents
    journal, February 2019

    • Breard, Eric C. P.; Jones, Jim R.; Fullard, Luke
    • Journal of Geophysical Research: Solid Earth, Vol. 124, Issue 2
    • DOI: 10.1029/2018jb016544

    Maximum Solid Phase Concentration in Geophysical Turbulent Gas‐Particle Flows: Insights From Laboratory Experiments
    journal, June 2019

    • Weit, A.; Roche, O.; Dubois, T.
    • Geophysical Research Letters, Vol. 46, Issue 12
    • DOI: 10.1029/2019gl082658

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