Understanding complex matter from simple packing models [6802-14]
نویسندگان
چکیده
By pouring equal balls into a container one obtains disordered packings with fascinating properties which might shed light on several elusive properties of complex materials such as amorphous metals or colloids. In any real experiment with equal-sized spheres one cannot reach packing fractions (fraction of volume occupied by the spheres respect to the total volume, ρ) below the Random Loose Packing limit (RLP, ρ ∼ 0.555) or above the Random Close Packing limit (RCP, ρ ∼ 0.645) unless order is externally induced. What is happening at these two limits is an open unanswered question. In this paper we address this question by combining statistical geometry and statistical mechanics methods. Evidences of phase transitions occurring at the RLP and RCP limits are reported. PACS: 45.70.-n Granular Systems 45.70.Cc Static sandpiles; Granular Compaction 81.05.RmPorous materials; granular materials
منابع مشابه
Reviewing the harvest index estimation in crop modeling
H Harvest index (HI), ratio of seed yield to aboveground dry matter, is a very important parameter for estimating seed yield in several crop models. In this study, the importance, definition, variability and estimation methods of HI in crop models were discussed. HI estimation methods are categorized into two groups including: (i) complex methods that estimate HI from the beginning of seed gro...
متن کاملCampylobacter upsaliensis isolated from young dogs with and without diarrhea.
1. Disciplina de Panejamento de Saúde Animal e Veterinária Preventiva do Departamento de Higiene Veterinária e Saúde Pública da Faculdade de Medicina Vetrinária e Zootecnia da Universidade do Estado de São Paulo, Botucatu, SP. Supported by grants from FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) Address to: Dr José Rafael Modolo. Caixa Postal 524, 18618-000 Botucatu, SP. Tel: 1...
متن کاملPacking fraction of crystalline structures of binary hard spheres: a general equation and application to amorphization.
In a previous paper analytical equations were derived for the packing fraction of crystalline structures consisting of bimodal randomly placed hard spheres [H. J. H. Brouwers, Phys. Rev. E 76, 041304 (2007)]. The bimodal packing fraction was derived for the three crystalline cubic systems: viz., face-centered cubic, body-centered cubic, and simple cubic. These three equations appeared also to b...
متن کاملImplementing Health in All Policies – Time and Ideas Matter Too!; Comment on “Understanding the Role of Public Administration in Implementing Action on the Social Determinants of Health and Health Inequities”
Carey and Friel suggest that we turn to knowledge developed in the field of public administration, especially new public governance, to better understand the process of implementing health in all policies (HiAP). In this commentary, I claim that theories from the policy studies bring a broader view of the policy process, complementary to that of new public governance. Drawing on the policy stud...
متن کاملAbstract: Packing rectangular shapes into a rectangular space is one of the most important discussions on Cutting & Packing problems (C;P) such as: cutting problem, bin-packing problem and distributor's pallet loading problem, etc. Assume a set of rectangular pieces with specific lengths, widths and utility values. Also assume a rectangular packing space with specific width and length. The obj...
متن کامل