English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Local origin of global contact numbers in frictional ellipsoid packings

Schaller, F. M., Neudecker, M., Saadatfar, M., Delaney, G., Schröder-Turk, G. E., & Schröter, M. (2015). Local origin of global contact numbers in frictional ellipsoid packings. Physical Review Letters, 114(15): 158001. doi:10.1103/PhysRevLett.114.158001.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-5F1F-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-C2A0-C
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Schaller, Fabian M.1, Author              
Neudecker, Max1, Author              
Saadatfar, Mohammad, Author
Delaney, Gary, Author
Schröder-Turk, Gerd E., Author
Schröter, Matthias1, Author              
Affiliations:
1Group Statistical mechanics of granular media, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, DE, ou_2063310              

Content

show
hide
Free keywords: -
 Abstract: In particulate soft matter systems the average number of contacts Z of a particle is an important predictor of the mechanical properties of the system. Using x-ray tomography, we analyze packings of frictional, oblate ellipsoids of various aspect ratios α, prepared at different global volume fractions ϕg. We find that Z is a monotonically increasing function of ϕg for all α. We demonstrate that this functional dependence can be explained by a local analysis where each particle is described by its local volume fraction ϕl computed from a Voronoi tessellation. Z can be expressed as an integral over all values of ϕl: Z(ϕg,α,X)=∫Zl(ϕl,α,X)P(ϕl|ϕg)dϕl. The local contact number function Zl(ϕl,α,X) describes the relevant physics in term of locally defined variables only, including possible higher order terms X. The conditional probability P(ϕl|ϕg) to find a specific value of ϕl given a global packing fraction ϕg is found to be independent of α and X. Our results demonstrate that for frictional particles a local approach is not only a theoretical requirement but also feasible.

Details

show
hide
Language(s): eng - English
 Dates: 2015-04-142015-04-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.114.158001
BibTex Citekey: schaller-prl-2015
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review Letters
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: 5 Volume / Issue: 114 (15) Sequence Number: 158001 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1