Journal Articles Physical Review Letters Year : 2009

Particle Pressure : A Bridge from Osmosis to Granular Dilatancy

Angélique Deboeuf
  • Function : Author
Georges Gauthier
Yevgeny Yurkovetsky
  • Function : Author
Jeffrey F Morris

Abstract

The normal stress exerted by particles in a sheared suspension is measured by analogy with a method used to measure osmotic pressure in solutions. Particles in a liquid of equal density are confined by a fine screen to a gap between two vertical concentric cylinders, the inner of which rotates. Pressure in the liquid is sensed either by a manometer or by a pressure transducer across the screen. The particles are large enough so that Brownian motion and equilibrium osmotic pressure are vanishingly small. The measured pressure yields the shear-induced particle pressure Π, which is the nonequilibrium continuation of equilibrium osmotic pressure. For volume fractions 0.3 ≤ φ ≤ 0.5, Π is strongly dependent on φ, and linear in shear rate. Comparisons of the measured particle pressure with modeling, experimental derivations, and simulation show good agreement.

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hal-02941621 , version 1 (17-09-2020)

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Angélique Deboeuf, Georges Gauthier, Jérôme Martin, Yevgeny Yurkovetsky, Jeffrey F Morris. Particle Pressure : A Bridge from Osmosis to Granular Dilatancy. Physical Review Letters, 2009, 102 (10), ⟨10.1103/PhysRevLett.102.108301⟩. ⟨hal-02941621⟩
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