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RESEARCH PRODUCT
The Influence of Crystal Size Distributions on the Rheology of Magmas: New Insights From Analog Experiments
S. MuellerJonathan M. CastroJohannes Kleinsubject
010504 meteorology & atmospheric sciencesDispersityMineralogyThermodynamics010502 geochemistry & geophysicsAtomic packing factor01 natural sciencesViscosityGeophysicsRheologyGeochemistry and PetrologyParticle-size distributionParticleParticle sizeSuspension (vehicle)Geology0105 earth and related environmental sciencesdescription
This study examines the influence of particle size distributions on the rheology of particle suspensions by using analogue experiments with spherical glass beads in silicone oil as magma equivalent. The analyses of 274 individual particle-bearing suspensions of varying modality (uni-, bi- tri- and tetramodality), as well as of polymodal suspensions with specific defined skewness and variance, are the first data set of its kind and provide important insights in the relationship between the solid particles of a suspension and its rheological behaviour. Since the relationship between the rheology of particle bearing suspensions and its maximum packing fraction ϕm is well established by several theoretical models, the results of the analogue experiments of this study reveal that the polydispersity γ exerts the largest influence on ϕm. Consequently, the estimation of the polydispersity γ of a particle size distribution is essential for estimating the viscosity of that given suspension.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-11-01 | Geochemistry, Geophysics, Geosystems |