CFD analysis on heat transfer and pressure drop characteristics of turbulent flow in a tube fitted with trapezoidal-cut twisted tape insert using Fe3O4 nano fluid

Heat transfer and friction factor characteristics of a circular tube fitted with full length twisted tape trapezoidal cut were studied for the Reynolds number range of 2000-12,000. The secured experimental data from plain tube were validated with standard correlations to make sure the authorization of experimental results. The thermal performance of trapezoidal cut twisted tape increase significantly than the plain tube. Performance ratio is more than unity is reasonable for trapezoidal cut twisted tape. Eventually twisted tape with water as the working fluid was compared with Fe3O4 Nanofluid as working fluid at a volume concentration of 0.06%. (C) 2019 Elsevier Ltd. All rights reserved.