University of Sistan and Baluchestan, Iranian Society Of Mechanical Engineers Challenges in Nano and Micro Scale Science and Technology 2821-000X 1 1 2013 01 01 Investigation of the Effect of Nanoparticles Mean Diameter on Turbulent Mixed Convection of a Nanofluid in a Horizontal Curved tube Using a Two Phase Approach 64 74 997 10.7508/tpnms.2013.01.007 EN O. Ghaffari Mechanical Engineering Department, University of Sistan and Baluchestan, Zahedan, I.R. Iran A. Behzadmehr Mechanical Engineering Department, University of Sistan and Baluchestan, Zahedan, I.R. Iran Journal Article 2013 06 30 Turbulent mixed convection of a nanofluid (water/Al2O3, Φ=.02) has been studied numerically. Two-phase <br />mixture model has been used to investigate the effects of nanoparticles mean diameter on the flow parameters. Nanoparticles distribution at the tube cross section shows that the particles are uniformly dispersed. The non-uniformity of the particles distribution occurs in the case of large nanoparticles and/or high value of the Grashof numbers. The study of particle size effect showed that the effective Nusselt number and turbulent intensity increases with the decreased of particle size. https://chal.usb.ac.ir/article_997_d472c32290701d713a0453f8ff4f880f.pdf