Abstract
The paper presents results of rheological experiments on viscosity under anisotropic pressure and in electric field of diethylene glycol-based MgAl2O4 nanofluids. Nanofluids have been prepared in a two-step method. The dynamic viscosity of nanofluids with various mass concentrations of nanoparticles was measured in the range of shear rates from 10 s −1 to 1,000 s −1 in constant temperature under the pressure of 7.5 MPa. In the second type of experiments, different values of the electric field up to 2,000 V/mm was used. Thixotropy structure of MgAl2O4-DG nanofluids has been studied in electrical field.
Highlights
IntroductionNanofluids, suspensions of nanoparticles, are increasingly being used in various industrial [1,2] and medical applications [3]
Nanofluids, suspensions of nanoparticles, are increasingly being used in various industrial [1,2] and medical applications [3].Most of the industrial applications result from increased thermal conductivity, which was reported for the first time in the second half of the 90th twentieth century
Pressure measurement A study to determine the dynamic viscosity curve of MgAl2O4-diethylene glycol (DG) nanofluid under anisotropic high pressure was conducted
Summary
Nanofluids, suspensions of nanoparticles, are increasingly being used in various industrial [1,2] and medical applications [3]. Most of the industrial applications result from increased thermal conductivity, which was reported for the first time in the second half of the 90th twentieth century. A large number of papers on thermal conductivity of these materials have resulted in the formation of theoretical models of this issue [10,11,12]. The issue of using nanofluids was reduced to produce and use as a drug nanosuspension. In case of this type of application of nanofluids, not the thermal conductivity but the rheological properties of suspension are the most important factors
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