Journal ArticleDOI
Non-Newtonian behavior of plagioclase-bearing basaltic magma: Subliquidus viscosity measurement of the 1707 basalt of Fuji volcano, Japan
TLDR
In this paper, a modified form of the Krieger-Dougherty equation is introduced to describe the dependencies of relative viscosity on both the crystal volume fraction and shear strain rate, and consequently the onset of shear-thinning behavior.About:
This article is published in Journal of Volcanology and Geothermal Research.The article was published on 2009-03-20. It has received 96 citations till now. The article focuses on the topics: Apparent viscosity & Non-Newtonian fluid.read more
Citations
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The rheology of two-phase magmas: A review and analysis
TL;DR: In this article, the authors present a new semi-empirical constitutive model for bubble-bearing suspensions, which is valid for steady and unsteady flow and large strains and strain-rates.
Journal ArticleDOI
The Rheology of crystal-bearing basaltic magmas from Stromboli and Etna
TL;DR: In this article, the authors investigate the high temperature (1131°C) of a basaltic volcano and investigate its behavior in terms of the textural evolution and rheological properties of eruptive products.
Journal ArticleDOI
Effects of crystal shape- and size-modality on magma rheology
P. Moitra,Helge M. Gonnermann +1 more
TL;DR: In this paper, a suite of shear viscosity measurements on liquid-particle suspensions of dynamical similarity to crystal-bearing magma was performed, and the results were fitted using a Herschel-Bulkley model and augment existing predictive capabilities.
Journal ArticleDOI
Rheology of magmas with bimodal crystal size and shape distributions: Insights from analog experiments
TL;DR: In this article, rotational rheometric methods are used to determine the rheology of monodisperse and polydisperse suspensions consisting of smaller, prolate particles (microlites) and larger, equant particles (phenocrysts) in a bubble-free Newtonian liquid (silicate melt).
Journal ArticleDOI
Magmatic architecture of dome-building eruptions at Volcán de Colima, Mexico
Yan Lavallée,Nick Varley,M. A. Alatorre-Ibarguengoitia,Kai-Uwe Hess,Ulrich Kueppers,S. Mueller,D. Richard,Bettina Scheu,O. Spieler,Donald B. Dingwell +9 more
TL;DR: In this article, the configuration of the shallow plumbing system was inferred from direct observation of extrusion sites and porosity of erupted products, and the conditions that lead to fragmentation and, ultimately, to explosive eruptions.
References
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The motion of ellipsoidal particles immersed in a viscous fluid
TL;DR: In this article, the authors considered the case of particles of ellipsoidal shape, and showed that the condition for the validity of this approximation is that the product of the velocity of the ellipssoid by its linear dimensions shall be small compared with the "kinematic coefficient, of viscosity" of the fluid.
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A Mechanism for Non‐Newtonian Flow in Suspensions of Rigid Spheres
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Viscosity of magmatic liquids: A model
TL;DR: In this paper, a model that predicts the non-Arrhenian Newtonian viscosity of silicate melts as a function of T and melt composition, including the rheologically important volatile constituents H2O and F, is presented.
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Improving the Density of Jammed Disordered Packings Using Ellipsoids
Aleksandar Donev,Ibrahim I Cisse,Ibrahim I Cisse,David Sachs,Evan A. Variano,Evan A. Variano,Frank H. Stillinger,Robert Connelly,Salvatore Torquato,Paul Chaikin +9 more
TL;DR: It is shown experimentally and with a new simulation algorithm that ellipsoids can randomly pack more densely and suggested that the higher density is directly related to the higher number of degrees of freedom per particle and thus the larger number of particle contacts required to mechanically stabilize the packing.
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The viscosity of suspensions of rigid spheres
TL;DR: In this paper, the dependence of the relative viscosity on the size distribution of the suspended spheres was explained, and it was shown theoretically that if the spheres are of very diverse sizes, the relative viscousity is (1 - c)-2.5 for all values of the volume concentration c.