Forced Convection in Nanofluids

Abstract

AbstractAfter discussing the various thermophysical properties of the nanofluids and the effects of various parameters on these thermophysical properties, we are now entering in the field of forced convective heat transfer. The researchers across the worlds have found out that nanofluids (the colloidal suspension of nano-sized particles into the conventional base fluid) reveals some exciting results for the convective heat transfer. The chapter summarizes and analyzes the various experimental and numerical results reporting the convective heat transfer using nanofluids. The enhancement in the heat transfer by using nanofluids is not a common conclusive argument have reported by the researchers. Some researchers have reported the deterioration, and some shows anomalous enhancement in the heat transfer. The conclusion on the mechanism behind the change in the convective heat transfer is still not clear using the nanofluids. On the other hand, pressure drop enhancement is reported by the researchers while using the nanofluids, and it is increased with the concentration. At high particle concentration, the increment is noted around 5% compared to water. The dimensionless number such as Nusselt number and Reynolds number are used to study the convective heat transfer. The fundamentals of the heat transfer and nanofluids have been discussed already in the previous chapters. This chapter discusses the convective heat transfer and pressure drop characteristics in different flow regimes of the internal forced convection.