Characterizing the surface texture of a dense suspension undergoing dynamic jamming
| Autor: | Ivo R. Peters, Olav Rømcke, R. Jason Hearst |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Fluid Flow and Transfer Processes
Surface (mathematics) Materials science Computational Mechanics Fluid Dynamics (physics.flu-dyn) General Physics and Astronomy Infinitesimal strain theory FOS: Physical sciences Geometry Jamming Surface finish Physics - Fluid Dynamics Condensed Matter - Soft Condensed Matter Condensed Matter::Soft Condensed Matter Particle image velocimetry Mechanics of Materials Free surface Reflection (physics) Soft Condensed Matter (cond-mat.soft) Suspension (vehicle) |
| Zdroj: | Experiments in Fluids |
| Popis: | Abstract Measurements of the surface velocity and surface texture of a freely propagating shear jamming front in a dense suspension are compared. The velocity fields are captured with particle image velocimetry (PIV), while the surface texture is captured in a separated experiment by observing a direct reflection on the suspension surface with high-speed cameras. A method for quantifying the surface features and their orientation is presented based on the fast Fourier transform of localized windows. The region that exhibits strong surface features corresponds to the the solid-like jammed region identified via the PIV measurements. Moreover, the surface features within the jammed region are predominantly oriented in the same direction as the eigenvectors of the strain tensor. Thus, from images of the free surface, our analysis is able to show that the surface texture contains information on the principle strain directions and the propagation of the jamming front. Graphic Abstract |
| Databáze: | OpenAIRE |
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