Length scales in granular matter

Zhao, Song-Chuan

dc.contributor.advisor	Herminghaus, Stephan Prof. Dr.	de
dc.contributor.author	Zhao, Song-Chuan	de
dc.date.accessioned	2013-04-24T08:05:20Z	de
dc.date.available	2013-04-24T08:05:20Z	de
dc.date.issued	2013-04-24	de
dc.identifier.uri	http://hdl.handle.net/11858/00-1735-0000-0015-9D98-C	de
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-3812
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject.ddc	530	de
dc.title	Length scales in granular matter	de
dc.type	doctoralThesis	de
dc.contributor.referee	Herminghaus, Stephan Prof. Dr.	de
dc.date.examination	2013-02-28	de
dc.subject.gok	Physik (PPN621336750)	de
dc.description.abstracteng	Jammed packings of granular materials differ from thermal systems normally described by statistical mechanics. In recent years a statistical mechanics of static granular media has emerged by using the volume of the system as the macroscopic variable. Voronoi volume is a popular building block of the system volume. We measure the two-point correlation of free Voronoi volumes in binary disc packings. Both positive correlation and negative correlation are observed. We extract three lengths to describe the spatial extension of the correlations, and show how the lengths develop with packing fractions. The influence of the correlations on the statistical mechanics are studied by measuring the configurational temperature replacing the thermodynamic temperature by three methods. The configurational temperature becomes intensive for sample size larger than the characteristic length of the correlation between Voronoi volumes. In the second part, we perform the same analysis on 3D sphere packings.	de
dc.contributor.coReferee	Zippelius, Annette Prof. Dr.	de
dc.subject.eng	granular matter; statistical theory; disc packings	de
dc.subject.eng	granular matter; statistical theory; disc packings; sphere packings	de
dc.identifier.urn	urn:nbn:de:gbv:7-11858/00-1735-0000-0015-9D98-C-0	de
dc.affiliation.institute	Fakultät für Physik	de
dc.identifier.ppn	746434448	de

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