An Experimental Investigation on the Effects of Shear Rate on Dynamic Viscosity of MWCNT-ZnO/Engine Oil on Different Temperatures and Solid Concentrations

Subject Areas : Nano

meisam asadi ¹ , seyfolah saedodin ²

1 - دانشجو
2 - استاد

Received: 2016-04-16 Accepted : 2016-04-20 Published : 2013-08-23

Keywords: ZnO, Dynamic Viscosity, Nanofluid, Shear rate, MWCNT, Engine Oil,

Abstract :

The aim of the present study is to investigate the effects of shear rate on dynamic viscosity of MWCNT-ZnO/engine oil hybrid nanofluid. Using two-step method and without using any surfactant, the studied nanofluid has been produced in different solid concentration (0.125, 0.5, and 1%) as the experimental sample. All the experiments were conducted in the temperatures ranging from 5 to 55°C and shear rates ranging from 50 to 1000 RPM. Based on the experimental results, although the base fluid showed Newtonian behavior in all the studied temperatures and shear rates, in the temperatures of 5 and 15°C, the studied nanofluid shows Non-Newtonian behavior while it shows Newtonian behavior in the temperatures of 25, 35, 45, and 55°C.