التفاصيل البيبلوغرافية
| العنوان: |
Boundary conditions alter density and stress fluctuations in shear-thickening suspensions. |
| المؤلفون: |
Hu, Meng-Fei1 (AUTHOR), Zhao, Song-Chuan1 (AUTHOR) songchuan.zhao@outlook.com |
| المصدر: |
Journal of Rheology. Nov2024, Vol. 68 Issue 6, p985-994. 10p. |
| مصطلحات موضوعية: |
*FIXED interest rates, *SHEARING force, *DENSITY |
| مستخلص: |
Discontinuous shear thickening in dense suspensions is accompanied by significant fluctuations in stress at a fixed shear rate. In this work, normal stress fluctuations are shown to have a one-to-one relationship with the formation and dissolution of local high-density regions. Namely, a burst in the force response corresponds to the spontaneous appearance of inhomogeneity. We observe that boundary conditions can significantly alter the spatiotemporal scale of these fluctuations, from short-lived to more sustained and enduring patterns. We estimate the occurrence frequency R and the average intensity Q of individual bursts/inhomogeneity events. The growth of R with the shear rate is the most rapid for the rigid boundary, whereas Q is nonmonotonic with confinement stiffness. Our results indicate that boundary conditions alter the development of inhomogeneity and thus the stress response under shear. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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