Nanofluid is prepared through the nanoscale particles suspended in a fluid base and Nanotechnology is a new attempt to investigate the thermal sciences. As a result of huge investment in developed countries on nanotechnology, research on thermal properties of nano-fluids is of particular interest.Due to the usage of nanotechnology to reduce energy waste, in this project CeO2 with EG is used to prepare the nanofluid. For stabilization of nanofluid ultrasonic wave is used and viscosity is measured by digital viscometer. In this paper, the effects of temperature and volume fraction on viscosity of nanofluids are considered. This study indicated that the viscosity decrease in all concentrations when temperature is increasing and it increases with additioning volume fraction of nanoparticles. Also, the results show that viscosity changes related to temperature at higher concentrations. After deliberation of rheological properties and laboratory characteristics the exact formula for nanofluids viscosity obtained according to temperature and volume fraction to high accuracy. Manuscript profile

Nanofluid is made through the nanoscale particles suspended in a fluid base and Nanotechnology is a new attempt in thermal science investigations. As a result of huge investment in developed countries on nanotechnology, research on thermal properties of nano-fluids is of particular interest. Due to the usage of nanotechnology to reduce energy consumptions, in this project CeO2 with EG is used to make the nanofluid.For stabilization of nanofluid ultrasonic wave is used and viscosity is measured by a digital viscometer. In this paper, the effects of temperature and volume fraction on the viscosity of nanofluids are considered.This study indicated that the viscosity decreases in all concentrations when temperature increased. Also it increases when the volume fraction of nanoparticles increases. Results show that viscosity changes related to temperature at higher concentrations are higher. After considering the rheological properties and getting accurate test results, it is possible to obtain a relation to predict the nanofluid viscosity based on the temperature and volume fraction with high accuracy Manuscript profile