Convective heat transfer studies in dilute alumina and silica nanofluids flowing through a channel using Mach-Zehnder interferometry

Nanofluid Heat Transfer: Enhancement of the Heat Transfer Coefficient inside Microchannels

“…Another study by Hwang et al [89] found increasing concentration of Al₂O₃ nanoparticles in water which resulted in an 8% increase in the heat transfer coefficient as the concentration was raised from 0.01% to 0.3%. Akhavan-Zanjani et al [16] also found In the study performed by Mohan et al [79], the concentration of an SiO 2 -water nanofluid was increased from 0.01% to 0.02% by volume. The lower concentration was found to have a higher heat transfer coefficient.…”

“…Volume concentrations for Al₂O₃-water-based nanofluid ranged from 0 to 9%. Figure 17 In the study performed by Mohan et al [79], the concentration of an SiO₂-water nanofluid was increased from 0.01% to 0.02% by volume. The lower concentration was found to have a higher heat transfer coefficient.…”

“…The thermal boundary layer of the nanofluid is smallest when the heat transfer coefficient is the largest. Mohan et al [79] found, while running different nanofluids through a thermally insulated pipe, that an alumina nanofluid had an average thermal boundary thickness of 0.43 mm, while a similar concentration of a silica nanofluid had an average boundary thickness of 0.67 mm. The base fluid was DI water and, by itself, had an average thermal boundary layer thickness of 0.56 mm.…”