Investigation of forced convective heat transfer with magnetic field effect on water/ethylene glycol-cobalt zinc ferrite nanofluid

In this work, the magnetic field effect on the convective heat transfer (CHT) properties of nanofluids comprising cobalt-zinc ferrite nanoparticles were experimentally studied. The nanofluid was prepared by dispersing the cobalt-zinc ferrite nanoparticles in the water and ethylene glycol mixture (80:20) and subjected to heat transfer studies. The experiment result exhibited that the CHT coefficient increased with the increase in the nanofluid concentration. The maximum CHT coefficient exhibited at a concentration of 0.2 wt%, which was improved by about 23.9%. It was also found that the CHT coefficient at a magnetic field of 750 G was increased by about 2.64% compared to that at 0 G for 0.2 wt% cobalt-zinc ferrite nanofluid concentration. The nanofluid with 0.2 wt% cobalt-zinc ferrite concentration exhibited the maximum CHT coefficient and pressure drop increase rate by 17% when the magnetic field was increased from 0 to 750 G.

Automated summary

The experimental results show that the convective heat transfer properties of cobalt-zinc ferrite nanofluids are significantly affected by magnetic field, with the CHT coefficient increasing with the concentration of nanofluids and the presence of a magnetic field.