RELAXATION DYNAMICS IN SUSPENSIONS OF FERROMAGNETIC PARTICLES

被引：10

作者：

MIGUEL, MC

RUBI, JM

机构：

[1] Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, 08028 Barcelona

来源：

PHYSICAL REVIEW E | 1995年 / 51卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.51.2190

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We have studied the relaxation dynamics of a dilute assembly of ferromagnetic particles in suspension. A formalism based on the Smoluchowski equation, describing the evolution of the probability density for the directions of the magnetic moment and of the axis of easy magnetization of the particles, has been developed. We compute the rotational viscosity from a Green-Kubo formula and give an expression for the relaxation time of the particles which comes from the dynamic equations of the correlation functions. Concerning the relaxation time for the particles, our results agree quite well with experiments performed on different samples of ferromagnetic particles for which the magnetic energy, associated with the interaction between the magnetic moments and the external field, or the energy of anisotropy plays a dominant role. © 1995 The American Physical Society.

引用

页码：2190 / 2198

页数：9

共 19 条

[1] FERROFLUID VISCOMETER [J].

BACRI, JC ;

DUMAS, J ;

GORSE, D ;

PERZYNSKI, R ;

SALIN, D .

JOURNAL DE PHYSIQUE LETTRES, 1985, 46 (24) :1199-1205

[2] FERROFLUID VISCOMETER - TRANSIENT MAGNETIC BIREFRINGENCE IN CROSSED FIELDS [J].

BACRI, JC ;

DJERFI, K ;

NEVEU, S ;

PERZYNSKI, R .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1993, 123 (1-2) :67-73

[3]

BACRI JC, 1993, 12 P SITG C

[4]

Bashtovoy V.G., 1998, INTRO THERMOMECHANIC

[5]

BROWN WF, 1963, PHYS REV, V130, P1667

[6]

CABUIL V, 1993, 6TH P INT C MAGN FLU

[7] THEORY OF DEBYE AND FAR IR ABSORPTION OF POLAR FLUIDS [J].

CALDERWOOD, JH ;

COFFEY, WT .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1977, 356 (1685) :269-286

[8]

Coffey W, 1992, ADV CHEM PHYS, V83, P263, DOI [10.1002/9780470141410.ch5/summary, DOI 10.1002/9780470141410.CH5]

[9]

Doi M., 1986, THEORY POLYM DYNAMIC

[10]

GILBERT TL, 1955, PHYS REV, V100, P1243

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