Measuring the rotational viscosity of ferrofluids without shear flow

被引：50

作者：

Embs, J

Müller, HW

Wagner, C

Knorr, K

Lücke, M

机构：

[1] Univ Saarland, D-66041 Saarbrucken, Germany

[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

PHYSICAL REVIEW E | 2000年 / 61卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.61.R2196

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：

The shear free solid-body rotation of a ferrofluid in a magnetic field experiences a damping due to internal rotational friction. A device based on the principle of a torsional pendulum is presented. It allows us to perform direct and precise measurements of the field dependence of the genuine rotational viscosity without a disturbing shear flow. Experimental results for a moderately concentrated ferrofluid compare reasonably well with theoretical models for monodisperse ferrofluids of noninteracting rigid dipoles.

引用

页码：R2196 / R2199

页数：4

共 18 条

[1] ROTATIONAL VISCOSITY IN FERROFLUIDS [J].