Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
International Journal of Fluid Mechanics Research
ESCI SJR: 0.22 SNIP: 0.446 CiteScore™: 0.5

ISSN Print: 2152-5102
ISSN Online: 2152-5110

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v27.i2-4.80
pages 289-305

Dynamic Properties of Non-Dilute Magnetic Fluids

A. Yu. Zubarev
Ural State University, Ekaterinburg, Russia
A. V. Yushkov
Ural State University, Ekaterinburg, Russia

ABSTRACT

Functions of dynamic response to external magnetic field as well as rheological properties of moderately concentrated magnetic colloid consisting of identical spherical single-domain ferromagnetic particles have been derived by methods of statistical physics. Hydrodynamic and magnetodipole interactions between the particles were taken into account. The ferroparticle magnetic moment has been supposed to be constant in absolute value and to be frozen into the particle body. Our analysis has shown that the magnetodipole interaction increases both the functions of magnetic response and rheological parameters of the colloid as well as characteristic times of relaxation of both the colloid magnetization and hydrodynamic stress. We have studied some peculiarities of hydrodynamic behavior of the ferrocolloid in oscillating magnetic field. If the shear rate is large enough, the effective viscosity is nonmonotonic (with minimum) function of the field frequency w, the rotational effective viscosity is negative provided that this frequency is large enough. For the given w, the rotational viscosity is nonmonotonic function of the shear rate Ω. It is negative if Ω is small and positive if Ω. is large enough. The interparticle interaction increases the effective rotational viscosity in oscillating field.


Articles with similar content:

EXAMINING MUCIN TYPE AND MORPHOLOGY EFFECTS ON MAMMALIAN MUCUS MECHANICAL AND MICROSTRUCTURAL PROPERTIES
First Thermal and Fluids Engineering Summer Conference, Vol.17, 2015, issue
Erick S. Vasquez, Santanu Kundu, Elizabeth S. Duggan, Keisha Walters, Jordan Patrick Metcalf
OSCILLATORY FLOW IN THE HUMAN AIRWAYS FROM THE MOUTH THROUGH SEVERAL BRONCHIAL GENERATIONS
TSFP DIGITAL LIBRARY ONLINE, Vol.9, 2015, issue
Filippo Coletti, Christopher J. Elkins, Andrew J. Banko, John K. Eaton
Oscillations of the Body with Consideration of the Formation of Finite Contact Area
Journal of Automation and Information Sciences, Vol.45, 2013, issue 11
Victor P. Legeza
Electron-Hole Processes in an Antibarrier m — n Contact
Telecommunications and Radio Engineering, Vol.55, 2001, issue 12
N. A. Shekhovtsov, A. N. Shekhovtsov
INVESTIGATING THE EFFECT OF SOLID FILLERS ON MECHANICAL AND RHEOLOGICAL PROPERTIES OF COMPOSITE PROPELLANTS
International Journal of Energetic Materials and Chemical Propulsion, Vol.12, 2013, issue 1
Amir Raza, Muhammad Mazhar Iqbal, Wang Liang, Nazakat Ali, Sajid Raza Ch.