Experimental Study on Convective Thermal–Fluid Flow Transport Phenomena in Circular Tube Using Nanofluids

Abstract

The aim of the present study is to disclose the thermal–fluid flow transport phenomenon of nanofluids in the heated horizontal circular tube. Consideration is given to the effects of volume fraction of the nanoparticle and Reynolds number on the turbulent heat transfer and pressure loss. It is found that (i) each viscosity, for three different nanofluids, increases with an increase in the volume fraction of nanofluid, (ii) the corresponding pressure loss increases slightly in comparison with that of pure water, and (iii) substantial heat transfer enhancement is caused by suspending nanoparticles, but its effect is attenuated by large particle aggregation.

Keywords:

• Nanofluid
• Heat transfer
• Pressure loss
• Viscosity
• Turbulent flow

ACKNOWLEDGMENTS

This study was supported by the Grants-in-Aid for Scientific Research (C) (No.16560153) from the Japan Society for the Promotion of Science (JSPS). “The authors would like to thank for this support.