Effects of SiO2/Water Nanofluid Flow in a Square Cross-Sectioned Curved Duct

Abstract

Forced convection SiO2/water nanofluid flow and heat transfer was numerically performed in 180-degree three-dimensional curved duct with square cross section under steady and laminar flow conditions in this investigation. Dean number was changed from 102 to 898. All surface of curved duct was exposed to uniform and constant heat flux. Nanoparticle volume fractions was ranged 1.0%-4.0%. The average Nusselt number and average Darcy friction factor were determined for each nanoparticle volume fractions. Velocity and temperature profiles and secondary flows were analyzed in detail. In addition, numerical study results are expressed with engineering correlations as changing average Nusselt number and average Darcy friction factor with Dean number and nanoparticle volume fraction.

Keywords

• Laminar flow,Dean number,SiO2/water nanofluid,square cross-sectioned curved duct,forced convection

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