Numerical Investigation of Tio2 and Mwcnt Turbine Meter Oil Nanofluids : Flow and Hydrodynamic Properties

The present study investigated the effect of multi-wall carbon nanotubes (MWCNT) and TiO 2 nanoparticles with mass percent of 0.1, 0.2, and 0.3 at volume flow rates of 0.14, 0.35, and 1.2 [[EQUATION]] on lubricant, fluid flow within natural gas turbine meters. The oil pathway is meshed by Gambit software version 2. 4. 6 and the equations are solved by Fluent software version 19.1. Simulation results showed an increase in pressure drop in the presence of nanoparticles. The pressure drop was also increased with the increase of nanoparticles concentration, for example, in nanofluids containing MWCNT at the volume flow rate of 0.35 [[EQUATION]] , as the nanoparticles concentration increased from 0.1 to 0.3, the pressure drop increased from 92.72 Pa to 94.64 Pa. Additionally, modeling results confirmed that an increasing trend was seen in pressure drop with the increase of volume flow rate, and the maximum pressure drop was recorded at 1.2 [[EQUATION]] . The numerical results showed that the coefficient of friction increased with the increase of nanoparticles concentration. On the other hand, the coefficient of friction decreased as the volume flow rates increased. Furthermore, increasing the volume flow rate led to an increase in the entrance length, and accordingly, reaching the developed state was delayed. It was also observed that the entrance length decreased, and the developed state was reached faster as the nanoparticles concentration increased