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Effect of normal contact forces on the stress in shear rate invariant particle suspensions

Gillissen, JJJ; Wilson, HJ; (2019) Effect of normal contact forces on the stress in shear rate invariant particle suspensions. Physical Review Fluids , 4 (1) , Article 013301. 10.1103/PhysRevFluids.4.013301. Green open access

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Abstract

We present a tensorial theory for the microstructure and the stress in shear rate invariant particle suspensions that includes hydrodynamic and normal but not tangential hard sphere interaction forces. The theory predicts that hydrodynamic forces produce a negligible first normal stress difference, while contact forces produce a positive first normal stress difference. The theory thereby provides a rationale for seemingly contradicting experimental observations in the literature. In addition, the theory captures the experimentally observed time dependence of the shear stress after shear reversal.

Type: Article
Title: Effect of normal contact forces on the stress in shear rate invariant particle suspensions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevFluids.4.013301
Publisher version: http://doi.org/10.1103/PhysRevFluids.4.013301
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics
URI: http://discovery.ucl.ac.uk/id/eprint/10065091
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