Frequency dependent structures in an electrostatically driven powder medium

被引：1

作者：

Salvatierra, L. M. ^{[1
,2
]}

Cortes Bracho, O. L. ^{[1
]}

Dammig Quina, P. L. ^{[1
]}

Irurzun, I. M. ^{[1
]}

Mola, E. E. ^{[1
,2
]}

机构：

[1] Natl Univ La Plata, CCT La Plata, CONICET, INIFTA,Fac Ciencias Exactas, RA-1900 La Plata, Argentina

[2] Pontificia Univ Catolica Argentina, Fac Quim & Ingn, RA-2000 Rosario, Santa Fe, Argentina

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 481卷 / 4-6期

关键词：

GRANULAR MEDIA;

D O I：

10.1016/j.cplett.2009.09.043

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the existence of different phases when a composite inorganic powder salt, made up of irregularly shaped particles, is under the influence of a high electric field with variable amplitude and frequency. We show that the charged granular medium undergoes a fingering growth resulting in consequent coarsening of the fingers. The size, velocity and stability of the fingers vary with the frequency and amplitude of the electric field. We also found phases that we called a granular solid and a granular gas. We propose a phase diagram of a granular system under the influence of a high electric field. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：194 / 197

页数：4