Ejection of ferrofluid grains using nonlinear acoustic impulses— A particle dynamical study

We consider a model dilute ferrofluid with the grains suspended in water (e.g.,γ-Fe2O3) and subject the system to a strong, homogeneous magnetic field directed perpendicular to the surface such that there is chain formation along the field direction. We show that an appropriate impulse initiated at...

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Bibliographic Details
Published inApplied physics letters Vol. 75; no. 10; pp. 1479 - 1481
Main Authors Sen, Surajit, Manciu, Marian, Manciu, Felicia S.
Format Journal Article
LanguageEnglish
Published United States 06.09.1999
Subjects
ACOUSTICS
CHALCOGENIDES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COLLOIDS
DISPERSIONS
FERROMAGNETIC MATERIALS
FLUIDS
GRAIN SIZE
INKS
IRON COMPOUNDS
IRON OXIDES
MAGNETIC FIELDS
MAGNETIC MATERIALS
MATERIALS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PULSES
QUASI PARTICLES
SIZE
SOLITONS
SURFACE PROPERTIES
SURFACE TENSION
TRANSITION ELEMENT COMPOUNDS 661300 > Other Aspects of Physical Science > (1992-)
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Summary:We consider a model dilute ferrofluid with the grains suspended in water (e.g.,γ-Fe2O3) and subject the system to a strong, homogeneous magnetic field directed perpendicular to the surface such that there is chain formation along the field direction. We show that an appropriate impulse initiated at the base of the container might travel as a nondispersive soliton pulse with sufficient energy to overcome surface tension and eject the ferrofluid grain nearest to the liquid–air interface. The proposed mechanism, if successfully realized in the laboratory, could help design a nozzle-free, ink-jet printer of unparalleled resolution.
Bibliography:None
ISSN:0003-6951
1077-3118
DOI:10.1063/1.124731