NEGATIVE-VISCOSITY EFFECT IN A MAGNETIC FLUID

被引:193
作者
BACRI, JC
PERZYNSKI, R
SHLIOMIS, MI
BURDE, GI
机构
[1] WEIZMANN INST SCI, DEPT PHYS COMPLEX SYST, IL-76100 REHOVOT, ISRAEL
[2] INST DESERT RES, IL-84993 SEDE BOQER, ISRAEL
关键词
D O I
10.1103/PhysRevLett.75.2128
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The first experimental evidence of a ''negative-viscosity'' effect in a magnetic fluid is presented here. In a Poiseuille flow, a constant magnetic field balances vorticity and impedes the rotation of individual magnetic particles. Conversely, an alternating magnetic field helps vorticity and favors this rotation: The magnetic energy is partially transformed into the angular momentum of the particles, which in turn is converted into a hydrodynamic motion of the fluid. It manifests itself in a decrease of the total viscosity: Its rotational part becomes negative. The theory developed here corroborates the experimental results.
引用
收藏
页码:2128 / 2131
页数:4
相关论文
共 10 条
[1]   BEHAVIOR OF A MAGNETIC FLUID MICRODROP IN A ROTATING MAGNETIC-FIELD [J].
BACRI, JC ;
CEBERS, A ;
PERZYNSKI, R .
PHYSICAL REVIEW LETTERS, 1994, 72 (17) :2705-2708
[2]  
MARTSENY.MA, 1973, ZH EKSP TEOR FIZ+, V65, P834
[3]   MAGNETOVISCOSITY OF MAGNETIC COLLOIDS [J].
MCTAGUE, JP .
JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (01) :133-&
[4]   MAGNETIC BIREFRINGENCE OF COBALT FERRITE FERROFLUIDS [J].
NEVEUPRIN, S ;
TOURINHO, FA ;
BACRI, JC ;
PERZYNSKI, R .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1993, 80 (01) :1-10
[5]  
RAIKHER YL, 1994, ADV CHEM PHYS, V87, P595
[6]  
Rosensweig R.E., 2013, FERROHYDRODYNAMICS
[7]   MAGNETIC FLUID MOTION IN ROTATING FIELD [J].
ROSENSWEIG, RE ;
POPPLEWELL, J ;
JOHNSTON, RJ .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1990, 85 (1-3) :171-180
[8]  
SHLIOMIS MI, 1972, SOV PHYS JETP-USSR, V34, P1291
[9]   NEGATIVE VISCOSITY OF FERROFLUID UNDER ALTERNATING MAGNETIC-FIELD [J].
SHLIOMIS, MI ;
MOROZOV, KI .
PHYSICS OF FLUIDS, 1994, 6 (08) :2855-2861
[10]   FERROHYDRODYNAMICS - AN ESSAY ON THE PROGRESS OF IDEAS [J].
SHLIOMIS, MI ;
LYUBIMOVA, TP ;
LYUBIMOV, DV .
CHEMICAL ENGINEERING COMMUNICATIONS, 1988, 67 :275-290