Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Yield stress and shear-banding in granular suspensions   We study the emergence of a yield stress in dense suspensions of non-Brownian
particles, by combining local velocity and concentration measurements using
Magnetic Resonance Imaging with macroscopic rheometric experiments. We show
that the competition between gravity and viscous stresses is at the origin of
the development of a yield stress in these systems at relatively low volume
fractions. Moreover, it is accompanied by a shear banding phenomenon that is
the signature of this competition. However, if the system is carefully density
matched, no yield stress is encountered until a volume fraction of 62.7 0.3%.

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The categories of this paper are: astro-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: math
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The categories of this paper are: cs