Rheological and magnetorheological behaviour of some magnetic fluids on polar and nonpolar carrier liquids

被引：9

作者：

Balau, O

Bica, D

Koneracka, M

Kopcansky, P

Susan-Resiga, D

Vékás, L

机构：

[1] Romanian Acad, Lab Magnet Fluids, Ctr Fundamental & Adv Tech Res, Timisoara Branch, Timisoara 1900, Romania

[2] Univ Politehn Timisoara, Inst Complex Fluids, Timisoara 1900, Romania

[3] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[4] W Univ Timisoara, Fac Phys, Timisoara 1900, Romania

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2002年 / 16卷 / 17-18期

关键词：

D O I：

10.1142/S0217979202012967

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Rheological and magnetorheological behaviour of monolayer and double layer sterically stabilized magnetic fluids, with transformer oil (UTR), dioctilsebacate (DOS), heptanol (Hept), pentanol (Pent) and water (W) as carrier liquids, were investigated. The data for volumic concentration dependence of dynamic viscosity of high colloidal stability UTR, DOS, Hept and Pent samples are particularly well fitted by the formulas given by Vand (1948) and Chow (1994). The Chow type dependence proved its universal character as the viscosity data for dilution series of various magnetic fluids are well fitted by the same curve, regardless the nonpolar or polar charcater of the sample. The magnetorheological effect measured for low and medium concentration water based magnetic fluids is much higher, due to agglomerate formation process, than the corresponding values obtained for the well stabilized UTR, DOS, Hept and Pent samples, even at very high volumic fraction of magnetic nanoparticles.

引用

页码：2765 / 2771

页数：7