# The structural force arising from magnetic interactions in polydisperse ferrofluids

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The onset of ferromagnetic convection in a micropolar ferromagnetic fluid saturated porous layer heated from below in the presence of a uniform applied vertical magnetic field has been investigated. The rigid-isothermal boundaries of the fluid layer are considered to be ferromagnetic and the...

- A strategy for the assembly of three-dimensional mesoscopic structures using a ferrofluid. Ganguly, Ranjan; Gaind, Amit P.; Puri, Ishwar K. // Physics of Fluids;May2005, Vol. 17 Issue 5, p057103
A novel technique for the self-assembly of three-dimensional mesoscopic structures in a forced fluid flow by employing a magnetic field is described. There are advantages of using magnetic fields for this purpose: unlike many other forces, a magnetic force is effective even from a distance,...

- Dynamics of magnetic chains in a shear flow under the influence of a uniform magnetic field. Kang, Tae Gon; Hulsen, Martien A.; den Toonder, Jaap M. J. // Physics of Fluids;Apr2012, Vol. 24 Issue 4, p042001
We numerically investigate dynamics of magnetic chains and flow characteristics in a two-dimensional shear flow under the influence of a magnetic field applied externally. A direct simulation method is employed to solve the particulate flow in the creeping flow regime, taking into account both...

- Calculation of the fluctuation-dissipation ratio for the nonequilibrium critical behavior of disordered systems. Prudnikov, P.; Prudnikov, V.; Pospelov, E. // JETP Letters;Jan2014, Vol. 98 Issue 10, p619
The values of a new universal parameter characterizing a nonequilibrium critical behavior, namely, the fluctuation-dissipation ratio specifying a fundamental relation between the dynamic response function and the correlation function, are calculated for the disordered three-dimensional Ising...

- AC field dependence of cluster disruption in magnetic fluids. Xiang, Qing; Zhong, Jing; Zhou, Ming; Cesar, Paulo; Liu, Wenzhong // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07B317
This paper attempts to explore the effects of the different external fields on the inverse susceptibility-temperature curve. The superlinear property found in the inverse susceptibility-temperature curve of magnetic nanoparticle colloid solutions is assumed to be related to dimer disruption. The...

- Magnetic Field Dependent Measurement Techniques of Surface Tension of Magnetic Fluid at an Air Interface. Nair, Nishant; Virpura, Hiral; Patel, Rajesh // AIP Conference Proceedings;2015, Vol. 1665, p1
We describe here two measurement techniques to determine surface tension of magnetic fluid. (i) magnetic field dependent capillary rise method and (ii) Taylor wavelength method in which the distance between the consecutive stable spikes was measured and then surface tension was calculated. The...

- Modelling of the Separation Process in a Ferrohydrostatic Separator Using Discrete Element Method. Murariu, V.; Sergeant, P. J. // Physical Separation in Science & Engineering;Jan2007, p1
This paper presents a model of the separation process in a ferrohydrostatic separator (FHS) which has been designed and developed at DBGS, De Beers, South Africa. Themodel was developed using special discrete element method software package called Particle Flow Code in 3D (PFC3D). Special...

- Influence of the domain structure in a magnetizing field on the high-frequency susceptibility of a ferromagnet. Dzhezherya, Yu. I.; Loktionov, I. K. // Physics of the Solid State;Apr97, Vol. 39 Issue 4, p586
The high-frequency properties of a biaxial domain-containing bulk ferromagnet in an external magnetic field with a modulated amplitude are investigated on the basis of the LandauLifshitz equations. The components of the frequency-dependent magnetic susceptibility tensor and the dependence of the...

- Field-Induced Metamagnetic Transition In Sm0.52Sr0.48MnO3. Sarkar, P.; Mandal, P.; Bera, A. K.; Yusuf, S. M. // AIP Conference Proceedings;4/24/2008, Vol. 1003 Issue 1, p127
Magnetic field (H) induced step-like jump in magnetization (M) is observed in Sm0.52Sr0.48MnO3 single crystal above the Curie temperature (TC = 110 K). Such a metamagnetic jump in M occurs for H<4 T. The temperature and field dependence of magnetic susceptibility reveals that both ferromagnetic...