EXPERIMENTS ON TURBULENT HEAT TRANSFER AND FRICTION FACTOR IN REACTION WITH CARBON NANOTUBE BASED NANOFLUIDS

This paper highlights an experimental investigation upon the convective heat transfer and friction features of Carbon nanotube based nanofluid by means of a circular tube fixed with helical screw tape’s insertion with constant heat flux which is in irregular (Turbulent) flow condition. The nanofluids of 0.1% and 0.2% volume fractions are made available through a two step method. Besides, the helical screw tape’s insertion with twist ratios Y = 3, 2.44 and 1.78 is used. As a result of it, the Reynolds number position becomes changeable from 10000 to 22000.When there is average quality value in Nusselt number for 0.1% and 0.2% in a clean tube, respective and volume fractions of nanofluids are 9.58% and 14.72% available in comparison with deionized water. With the use of insertion, the normal quality values in Nusselt number corresponding to twist ratios 1.78, 2.44 and 3 are 30.11%, 19.44% and 17.53% for 0.1% available for volume fraction from nanofluid and 34.84%, 23.85% and 21.76% are available for 0.2% volume fraction of nanofluid in comparison with deionized water in a clean tube. The empirical correlations formed in terms of twist ratio, volume fraction and Reynolds number are quite acceptable with the experimental data within a limit of +- 15% exclusively for Nusselt number and friction factor