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Open Access Nano Express

Influence of anisotropic pressure on viscosity and electrorheology of diethylene glycol-based MgAl2O4 nanofluids

Gaweł Żyła1*, Joanna Grzywa1, Adam Witek2 and Marian Cholewa1

Author Affiliations

1 Department of Physics, Rzeszów 35-905, Poland

2 Institute of Ceramics and Building Materials, Warsaw 02-676, Poland

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Nanoscale Research Letters 2014, 9:170  doi:10.1186/1556-276X-9-170

Published: 8 April 2014

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.

Keywords:
Nanofluid; Nanosuspension; Rheology; Rheometry; Viscosity; Pressure; Electrorheology