in this research, some more applicable ferrofluids are produced and their mechanical specifications are measured, experimentally. also, their treatments in the ventilated cavity geometry are assessed numerically. the magnetite nanoparticles are produced by a chemical combination of fe2+ and fe3+ with nh3. in order to solve the nanoparticles in the new mediums, a proper coating is added to them....

Monte Carlo simulations of the classical two-dimensional discrete frustrated φ 4 model Abstract. The classical two-dimensional discrete frustrated φ 4 model is studied by Monte Carlo simulations. The correlation function is obtained for two values of a parameter d that determines the frustration in the model. The ground state is a ferro-phase for d = −0.35 and a commensurate phase with period N...

Monte Carlo simulations of the classical two-dimensional discrete frustrated φ 4 model Abstract. The classical two-dimensional discrete frustrated φ 4 model is studied by Monte Carlo simulations. The correlation function is obtained for two values of a parameter d that determines the frustration in the model. The ground state is a ferro-phase for d = −0.35 and a commensurate phase with period N...

In this paper, we study the effects of the Lorentz force and the induced anisotropic thermal conductivity due to a magnetic field on the flow and the heat transfer of a ferro-nanofluid. The ferro-nanofluid is modeled as a single-phase fluid, where the viscosity depends on the concentration of nanoparticles; the thermal conductivity shows anisotropy due to the presence of the nanoparticles and t...

There are errors in the Funding section. The correct funding information is as follows: This work was supported by National Natural Science Foundation of China (NNSFC31400091) (http://www.nsfc.gov.cn), Natural Science Foundation of Jiangsu Province (BK2012202) (http://www.jstd.gov.cn/), Chinese Postdoctoral Science Foundation (2013M540518) (http://res.chinapostdoctor.org.cn/BshWeb/index.shtml),...

This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and with ferro-nanofluid loaded in the capillary. The ferro-nanofluid was fabricated by a chemical co-precipitation method. The performances of the transformers with either air core or ferro-...

This essay investigates the magnetoviscous properties of ferro uid ow in both an external magnetic eld and in zero eld. Zeroeld properties of ferro uids are examined. Phenomena such as the dramatic increase in ferro uid viscosity in the presensce of a static eld as well as negative viscosity for an alternating magnetic eld are described.

The Blume Emery Griffiths model is investigated by use of the cluster variation method in the pair approximation. We determine the regions of the phase space where reentrant phenomenon takes place. Two regions are found, depending on the sign of the reduced quadrupole quadrupole coupling strength ξ. For negative ξ we find Para-Ferro-Para and Ferro-Para-Ferro-Para transition sequences; for posit...