SciELO - Scientific Electronic Library Online

 
vol.28 issue4Electric Double Layered Magnetic Fluids (EDL-MF) based on spinel ferrite nanostructures [(M1-x+2Fex+3)]A [(Fe2-x+3 Mx+2)]BO4-2Maritime Antarctica soils studied by Mössbauer spectroscopy and other methods author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Brazilian Journal of Physics

Print version ISSN 0103-9733

Abstract

DANTAS, A.L.L.; WALTON, D.  and  SHIBLI, S.M.. Collinear mirage effect measurement of the thermal diffusivity in ferrofluids. Braz. J. Phys. [online]. 1998, vol.28, n.4, pp. 00-00. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97331998000400017.

Thermal diffusivity results obtained for different concentrations of the same ferrofluid are reported. The collinear mirage technique was used for its adequacy in obtaining the thermal properties of semitransparent materials with low thermal diffusivities. The results show that, as the ferrofluid concentration increases, the thermal diffusivity also increases, leading to a different trend compared to those reported for ferronematics. The different behaviors observed can be related to the different geometries of thermal waves propagating throught the material.

        · text in English     · pdf in English