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
收藏
页码：R2196 / R2199
页数：4
相关论文
共 18 条
  • [1] ROTATIONAL VISCOSITY IN FERROFLUIDS
    AMBACHER, O
    ODENBACH, S
    STIERSTADT, K
    [J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1992, 86 (01): : 29 - 32
  • [2] Bashtovoy V.G., 1988, INTRO THERMOMECHANIC
  • [3] DEMAGNETIZING FACTORS FOR CYLINDERS
    CHEN, DX
    BRUG, JA
    GOLDFARB, RB
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) : 3601 - 3619
  • [4] Energy conversion in ferrofluids: Magnetic nanoparticles as motors or generators
    Gazeau, F
    Baravian, C
    Bacri, JC
    Perzynski, R
    Shliomis, MI
    [J]. PHYSICAL REVIEW E, 1997, 56 (01): : 614 - 618
  • [5] VISCOSITY OF MAGNETIC SUSPENSIONS
    HALL, WF
    BUSENBER.SN
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (01) : 137 - &
  • [6] FRICTIONAL TORQUE IN FERROFLUIDS
    HENJES, K
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1992, 117 (03) : L311 - L316
  • [7] ROTATIONAL VISCOSITY OF FERROFLUIDS AND THE TAYLOR INSTABILITY IN A MAGNETIC-FIELD
    HOLDERIED, M
    SCHWAB, L
    STIERSTADT, K
    [J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1988, 70 (04): : 431 - 433
  • [8] JACKSON JD, 1982, KLASSISCHE ELEKTRODY, pCH4
  • [9] MARTSENY.MA, 1973, ZH EKSP TEOR FIZ+, V65, P834
  • [10] MAGNETOVISCOSITY OF MAGNETIC COLLOIDS
    MCTAGUE, JP
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (01) : 133 - &
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