Magnetorheology for suspensions of solid particles dispersed in ferrofluids

Autor:	Juan D. G. Durán, Georges Bossis, S. Lacis, Fernando González-Caballero, Modesto T. López-López, Pavel Kuzhir
Rok vydání:	2006
Předmět:	Work (thermodynamics) Ferrofluid Range (particle radiation) Materials science Metallurgy Nanoparticle Condensed Matter Physics Magnetic field chemistry.chemical_compound chemistry Chemical engineering Magnetorheological fluid Shear stress General Materials Science Magnetite
Zdroj:	Journal of Physics: Condensed Matter. 18:S2803-S2813
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/18/38/s18
Popis:	In this work, the magnetorheological properties of suspensions of micron-sized iron particles dispersed in magnetite ferrofluids were studied. With this aim, the flow properties of the suspensions in the steady-state regime were investigated using a commercial magnetorheometer with a parallel-plate measuring cell. The effect of both magnetite and iron concentration on the magnitude of the yield stress was studied for a broad range of magnetic fields. In addition, the experimental values of the yield stress were compared with the predictions from the chain model. With this purpose the values of the yield stress were obtained by means of finite element calculations. Interestingly, it was found that the experimental yield stress increases with the concentration of magnetite nanoparticles in the ferrofluid. Unfortunately, this behaviour is not obtained from calculations based on the chain model, which predict just the opposite trend.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::61c99b75668bba48064da93fa638716d https://doi.org/10.1088/0953-8984/18/38/s18 Zobrazit plný text záznamu