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| Autori principali: | , , , |
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| Natura: | Preprint |
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2025
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| Accesso online: | https://arxiv.org/abs/2502.03857 |
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| _version_ | 1866912221991272448 |
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| author | Lin, Yuan Lin, Peiwen Liang, Yixuan Pan, Dingyi |
| author_facet | Lin, Yuan Lin, Peiwen Liang, Yixuan Pan, Dingyi |
| contents | The rheology of suspensions with meso-scaled particles [with size of $O(10^2)\ \text{nm}$ to $O(10)\ μ\text{m}$] is intriguing since significant non-Newtonian behaviors are widely observed although the thermal fluctuation (Brownain motion) of the meso-scaled particles is negligible. Here, we show that the linear constitutive relation for such systems fails due to a flow-induced particle aggregation, which originates from the inherent inter-particle interactions, e.g., the weakly adhesive van der Waals interaction. This accounts for the temporal evolution of the rheological property in both steady and oscillatory shear flows. A dimensionless number that measures the importance of the hydrodynamic interaction in shear flow with respect to the inter-particle interaction, {is} proposed, through which the non-linear constitutive relation for suspensions with various particle sizes, particle concentrations, as well as flow conditions could be unified. This investigation bridge \mdf{the gap between micro- and macro-scaled suspension systems} and make the rheology of the meso-scaled suspensions predictable. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_03857 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unifying shear thinning behaviors of meso-scaled particle suspensions Lin, Yuan Lin, Peiwen Liang, Yixuan Pan, Dingyi Soft Condensed Matter The rheology of suspensions with meso-scaled particles [with size of $O(10^2)\ \text{nm}$ to $O(10)\ μ\text{m}$] is intriguing since significant non-Newtonian behaviors are widely observed although the thermal fluctuation (Brownain motion) of the meso-scaled particles is negligible. Here, we show that the linear constitutive relation for such systems fails due to a flow-induced particle aggregation, which originates from the inherent inter-particle interactions, e.g., the weakly adhesive van der Waals interaction. This accounts for the temporal evolution of the rheological property in both steady and oscillatory shear flows. A dimensionless number that measures the importance of the hydrodynamic interaction in shear flow with respect to the inter-particle interaction, {is} proposed, through which the non-linear constitutive relation for suspensions with various particle sizes, particle concentrations, as well as flow conditions could be unified. This investigation bridge \mdf{the gap between micro- and macro-scaled suspension systems} and make the rheology of the meso-scaled suspensions predictable. |
| title | Unifying shear thinning behaviors of meso-scaled particle suspensions |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2502.03857 |