Normal stresses in shear thickening granular suspensions
When subjected to shear, granular suspensions exhibit normal stresses perpendicular to the shear plane but the magnitude and sign of the different components of the normal stresses are still under debate. By performing both oscillatory and rotational rheology measurements on shear thickening granular suspensions and systematically varying the particle diameters and the gap sizes between two parallel-plates, we show that a transition from a positive to a negative normal stress can be observed. We find that frictional interactions which determine the shear thickening behavior of suspensions contribute to the positive normal stresses. Increasing the particle diameters or decreasing the gap sizes leads to a growing importance of hydrodynamic interactions, which results in negative normal stresses. We determine a relaxation time for the system, set by both the pore and the gap sizes, that governs the fluid flow through the inter-particle space. Finally, using a two-fluid model we determine the relative contributions from the particle phase and the liquid phase.
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dig-wur-nl-wurpubs-5541862024-08-14 Pan, Zhongcheng de Cagny, Henri Habibi, M. Bonn, Daniel Article/Letter to editor Soft Matter 13 (2017) ISSN: 1744-6848 Normal stresses in shear thickening granular suspensions 2017 When subjected to shear, granular suspensions exhibit normal stresses perpendicular to the shear plane but the magnitude and sign of the different components of the normal stresses are still under debate. By performing both oscillatory and rotational rheology measurements on shear thickening granular suspensions and systematically varying the particle diameters and the gap sizes between two parallel-plates, we show that a transition from a positive to a negative normal stress can be observed. We find that frictional interactions which determine the shear thickening behavior of suspensions contribute to the positive normal stresses. Increasing the particle diameters or decreasing the gap sizes leads to a growing importance of hydrodynamic interactions, which results in negative normal stresses. We determine a relaxation time for the system, set by both the pore and the gap sizes, that governs the fluid flow through the inter-particle space. Finally, using a two-fluid model we determine the relative contributions from the particle phase and the liquid phase. en application/pdf https://research.wur.nl/en/publications/normal-stresses-in-shear-thickening-granular-suspensions 10.1039/C7SM00167C https://edepot.wur.nl/501599 Life Science Wageningen University & Research |
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Life Science Life Science Pan, Zhongcheng de Cagny, Henri Habibi, M. Bonn, Daniel Normal stresses in shear thickening granular suspensions |
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When subjected to shear, granular suspensions exhibit normal stresses perpendicular to the shear plane but the magnitude and sign of the different components of the normal stresses are still under debate. By performing both oscillatory and rotational rheology measurements on shear thickening granular suspensions and systematically varying the particle diameters and the gap sizes between two parallel-plates, we show that a transition from a positive to a negative normal stress can be observed. We find that frictional interactions which determine the shear thickening behavior of suspensions contribute to the positive normal stresses. Increasing the particle diameters or decreasing the gap sizes leads to a growing importance of hydrodynamic interactions, which results in negative normal stresses. We determine a relaxation time for the system, set by both the pore and the gap sizes, that governs the fluid flow through the inter-particle space. Finally, using a two-fluid model we determine the relative contributions from the particle phase and the liquid phase. |
format |
Article/Letter to editor |
topic_facet |
Life Science |
author |
Pan, Zhongcheng de Cagny, Henri Habibi, M. Bonn, Daniel |
author_facet |
Pan, Zhongcheng de Cagny, Henri Habibi, M. Bonn, Daniel |
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Pan, Zhongcheng |
title |
Normal stresses in shear thickening granular suspensions |
title_short |
Normal stresses in shear thickening granular suspensions |
title_full |
Normal stresses in shear thickening granular suspensions |
title_fullStr |
Normal stresses in shear thickening granular suspensions |
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Normal stresses in shear thickening granular suspensions |
title_sort |
normal stresses in shear thickening granular suspensions |
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https://research.wur.nl/en/publications/normal-stresses-in-shear-thickening-granular-suspensions |
work_keys_str_mv |
AT panzhongcheng normalstressesinshearthickeninggranularsuspensions AT decagnyhenri normalstressesinshearthickeninggranularsuspensions AT habibim normalstressesinshearthickeninggranularsuspensions AT bonndaniel normalstressesinshearthickeninggranularsuspensions |
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1813199165559144448 |