Description and performance of a fully automatic device for the study of the sedimentation of magnetic suspensions

Iglesias, G. R.; López-López, M. T.; Delgado, A. V.; Durán, J. D. G.
July 2011
Review of Scientific Instruments;Jul2011, Vol. 82 Issue 7, p073906
Academic Journal
In this paper we describe an experimental setup for the automatic determination of the sedimentation behavior of magnetic suspensions (i.e., disperse systems consisting on ferro- or ferri-magnetic particles in a suitable fluid) of arbitrary volume fraction of solids. The device is based on the evaluation of the inductance of a thin coil surrounding the test tube containing the sample. The inductance L is evaluated from the measurement of the resonant frequency of a parallel LC circuit constructed with the coil and a capacitor of known capacitance. The coil can be moved vertically along the tube at specified steps and time intervals, and from the knowledge of L as a function of the vertical position and time, one can get an image of the particle concentration profiles at given instants of time. The performance of the device is tested against suspensions of spherical iron particles in the micrometer size range dispersed in silicone oil, with various initial concentrations of solids. The sedimentation profiles are then compared with the predictions of existing models for the settling of disperse systems of non-interacting particles.


Related Articles

  • Determining the particle size of porous powders.  // Ceramic Industry;Oct98, Vol. 148 Issue 11, p26 

    Discusses sedimentation analysis based upon Stokes' Law for the determination of particle size distribution (PSD) in the ceramic industry. Instrument incorporating the law of measurement; Definition of effective density; PSD as an important quality control tool for powder processing.

  • Coprology of Panthera tigris altaica and Fells bengalensis euptilurus From the Russian Far East. González, P.; Carbonnell, E.; Urios, V.; Rozhnov, V.V. // Journal of Parasitology;Aug2007, Vol. 93 Issue 4, p948 

    The article examines the corpology of Pathera tigris altaica and Felis bengalensis euptilurus from the Russian far east. The section investigates fecal samples from the Siberian tiger and the Amur cat from Far Eastern Russia using natural sedimentation methodology and a complete examination of...

  • Particle size dependence of heating power in MgFe2O4 nanoparticles for hyperthermia therapy application. Barati, Mohammad Reza; Selomulya, Cordelia; Suzuki, Kiyonori // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17B522-1 

    Magnetic nanoparticles with narrow size distributions have successfully been synthesized by an ultrasonic assisted co-precipitation method. The effects of particle size on magnetic properties, heat generation by AC fields, and the cell cytotoxicity were investigated for MgFe2O4 nanoparticles...

  • Characterizing particles. Strickland, Michael L. // Ceramic Industry;Feb2006, Vol. 156 Issue 2, p12 

    Discusses the methods for determining particle size and shape. Differences among the laser light scattering, electrical sensing zone and X-ray sedimentation methods of particle size analysis; Theories used to interpret the results of laser light scattering; Information on image analysis, the...

  • Calculation of the coefficient of particle capture by polydisperse drops. Amanbaev, T.; Kalkhabai, G. // Theoretical Foundations of Chemical Engineering;Nov2006, Vol. 40 Issue 6, p666 

    The effect of the polydispersity of sprayed liquid drops on the dust collection factor is investigated. The dust collection efficiency is compared at various dispersion compositions of sprays obtained using different nozzles.

  • Fluid Flow Research In The Processes Of Particles Catching Intensification Due To Thermal Effects. Ryzhkov, Sergey; Basok, Boris // AIP Conference Proceedings;7/1/2009, Vol. 1145 Issue 1, p1035 

    The purpose of this work is to develop thermophoretic intensification of highly disperse particles sedimentation in the gas cleaning process. In the context of the project theoretical and experimental research on the stream hydrodynamics and particles sedimentation due to thermal effects on the...

  • Critical nanoparticle size for thermal stability. Praserthdam, P.; Phungphadung, J.; Somrang, P.; Kunyanucharat, A.; Silveston, P.; Tanakulrungsank, W. // Journal of Materials Science Letters;Nov2003, Vol. 22 Issue 22, p1587 

    The article focuses on the critical nanoparticle size for thermal stability. In temperature ranges up to a few hundred degrees above ambient temperature size changes even with unstable single crystals will be small. Crystallites of nano dimension can be formed by many methods. The method...

  • Inline high frequency ultrasonic particle sizer. Lefebvre, F.; Petit, J.; Nassar, G.; Debreyne, P.; Delaplace, G.; Nongaillard, B. // Review of Scientific Instruments;Jul2013, Vol. 84 Issue 7, p075101 

    This paper reports the development of a new method of particle sizing in a liquid. This method uses high frequency focused ultrasounds to detect particles crossing the focal zone of an ultrasonic sensor and to determine their size distribution by processing the reflected echoes. The major...

  • Particle tracking velocimetry using fast x-ray phase-contrast imaging. Im, Kyoung-Su; Fezzaa, K.; Wang, Y. J.; Liu, X.; Wang, Jin; Lai, M.-C. // Applied Physics Letters;2/26/2007, Vol. 90 Issue 9, p091919 

    The authors demonstrate the use of millisecond x-ray phase-contrast imaging for velocity measurement of particle-laden flows in an optically opaque vessel. Taking advantage of particle size polydispersity, this single-particle tracking approach is extremely effective on flows with tracer...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics