Experimental studies on viscosity, thermal and electrical conductivity of aluminum nitride–ethylene glycol (AlN–EG) nanofluids

Abstract

The paper presents the results of experimental research studies carried out on basic physical properties of aluminum nitride–ethylene glycol nanofluids. Nanofluids were prepared with two step method with use of the commercial available AlN nanoparticles. Dynamic viscosity of the material in the range of shear rates from 0.01 to 1000s−1 at pressure 0.1MPa, and constant temperature of 298.15K was measured. Thermal conductivity was measured using the transient line heat source method at a constant temperature of 298.15K. Finally the electrical conductivity at constant temperature of 298.15K was measured. It was presented that this material exhibits non-Newtonian nature and thermal conductivity increases linearly with the concentration of nanoparticles in suspension. AlN–EG nanofluid presents also a significant increase in electrical conductivity with the concentration of nanoparticles.