Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   MARCH 2017 , Volume 16 , Number 12 #F0074; Page(s) 518 To 528.
 
Paper: 

EXPERIMENTAL MEASUREMENT OF THE DYNAMIC VISCOSITY OF HYBRID ENGINE OIL -CUO- MWCNT NANOFLUID AND DEVELOPMENT OF A PRACTICAL VISCOSITY CORRELATION

 
 
Author(s):  AGHAEI ALIREZA, KHORASANIZADEH HOSSEIN*, SHEIKHZADEH GHANBAR ALI
 
* FACULTY OF MECHANICAL ENGINEERING, UNIVERSITY OF KASHAN, KASHAN, IRAN
 
Abstract: 

In this experimental study dynamic viscosity of hybrid engine oil (5w-50) -Cuo-MWCNT nanofluid for volume fractions of 0.05, 0.1, 0.25, 0.5, 0.75 and 1 percent of nanoparticles for temperatures of 5, 15, 25, 35, 45, 55oC has been measured. This hybrid nanofluid has been prepared utilizing the two-step method. For viscosity measurement, the Brookfield viscometer has been used. The experimental measurments indicate that by increasing volume fraction of nanoparticles the viscosity increases; also, by increasing the temperature the viscosity decreases. Based on the experimental results the maximum and minimum viscosity increases with volume fraction increase from 0.05 to 1 at a constant temperature are 35.52 and 12.92 percent, respectively, relating to 55 and 15oC. Measurement of the nanofluid viscosity with different volume fractions, shear rates and temperatures indicates its Newtonian behavior.
A new temperature and volume fraction dependent viscosity correlation, developed in this study to be used in numerical simulations, shows very good agreement with experimental results.

 
Keyword(s): VISCOSITY, HYBRID NANOFLUID, MWCNT, NEWTONIAN FLUID, EMPIRICAL CORRELATION
 
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