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URN to cite this document: urn:nbn:de:bvb:703-epub-5372-3
Title data
Huang, Kai ; Hernández-Delfin, Dariel ; Rech, Felix ; Dichtl, Valentin ; Hidalgo, Raúl Cruz:
The role of initial speed in projectile impacts into light granular media.
In: Scientific Reports.
Vol. 10
(2020)
Issue 1
.
- No. 3207.
ISSN 2045-2322
DOI der Verlagsversion: https://doi.org/10.1038/s41598-020-59950-z
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Project information
| Project title: |
Project's official title Project's id Open Access Publizieren No information |
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| Project financing: |
Deutsche Forschungsgemeinschaft |
Abstract
Projectile impact into a light granular material composed of expanded polypropylene (EPP) particles is investigated systematically with various impact velocities. Experimentally, the trajectory of an intruder moving inside the granular material is monitored with a recently developed non-invasive microwave radar system. Numerically, discrete element simulations together with coarse-graining techniques are employed to address both dynamics of the intruder and response of the granular bed. Our experimental and numerical results of the intruder dynamics agree with each other quantitatively and are in congruent with existing phenomenological model on granular drag. Stepping further, we explore the ‘microscopic’ origin of granular drag through characterizing the response of granular bed, including density, velocity and kinetic stress fields at the mean-field level. In addition, we find that the dynamics of cavity collapse behind the intruder changes significantly when increasing the initial speed . Moreover, the kinetic pressure ahead of the intruder decays exponentially in the co-moving system of the intruder. Its scaling gives rise to a characteristic length scale, which is in the order of intruder size. This finding is in perfect agreement with the long-scale inertial dissipation type that we find in all cases.
Further data
| Item Type: | Article in a journal |
|---|---|
| Keywords: | Condensed-matter physics; Fluid dynamics; Statistical physics; thermodynamics and nonlinear dynamics |
| DDC Subjects: | 500 Science > 530 Physics |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-5372-3 |
| Date Deposited: | 06 Apr 2021 07:43 |
| Last Modified: | 06 Apr 2021 09:21 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/5372 |
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