Please use this identifier to cite or link to this item: doi:10.22028/D291-40185
Title: Viscoelastic response of confined powder under large strain oscillations, characterized by its noise temperature
Author(s): Handa, Rishab
Wagner, Christian
Fiscina, Jorge Eduardo
Language: English
Title: The European Physical Journal E
Volume: 46
Issue: 7
Publisher/Platform: Springer Nature
Year of Publication: 2023
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: We report a study on granular matter with and without small additions of silicon oil, under low-frequency and large amplitude oscillatory shear strain under constant normal pressure, by running experiments with a rotational rheometer with a cup-and-plate geometry. We analysed the expansion with the Chebyshev polynomials of the orthogonal decomposition of stress–strain Lissajous–Bowditch loops. We found the onset of the strain amplitude for the yielding regime indicated a regime change from filament-like structures of grains to grain rearrangements for the dry granulate and from oscillations to the breaking and regeneration of liquid bridges for wet granulates. We have shown that this viscoelastic dynamics can be characterized by a noise temperature following Sollich et al. (Phys Rev Lett PhysRevLett.78.2020, 1997). The analysis of the first harmonics of the Chebyshev expansion showed that the state of disorder of dry and wet granular matter in pre-yielding and yielding regimes involved ensembles of different inherent states; thus, each of them was governed by a different noise temperature. The higherorder harmonics of the Chebyshev expansion revealed a proportionality between the viscous nonlinearity and the variation in the elastic nonlinearity induced by the deformation, which shows the coupling between the elastic deformation and the viscous flow of mesoscopic-scale structures.
DOI of the first publication: 10.1140/epje/s10189-023-00310-w
URL of the first publication:
Link to this record: urn:nbn:de:bsz:291--ds-401859
ISSN: 1292-895X
Date of registration: 24-Jul-2023
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Physik
Professorship: NT - Prof. Dr. Christian Wagner
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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