Effect of Multi-Walled Carbon Nanotubes Concentrations on Heat Transfer in Nanofluid
Muhammad Imran Salim Asrab Ali, Rosaniza Md Isa, Hussin Mamat
Nanofluids are being widely used in many applications due to their ability to increase heat transfer in the fluids. The present study is aimed to investigate the potential of multi-walled carbon nanotubes (MWCNT) in the based fluid as a coolant for battery application. Nanofluids based on MWCNT and pure distilled water was prepared in the experimental work. Different volume percentage (vol %) of MWCNT was used to prepare the nanofluids; 0.1%, 0.2%, 0.3%, 0.4% and 0.5% vol%. Analysis was done experimentally and through simulation using ANSYS Workbench to identify the best composition of nanoparticles required in nanofluid to enhance heat transfer. Experimental data on the heat transfer coefficient show an enhancement from 11.5% to 30.2% for 0.1 vol% MWCNT and 0.5 vol% MWCNT, respectively. From the simulation of the nanofluid, it was found that 0.5 vol% MWCNT nanofluid provides the highest heat transfer enhancement. This is contrary to the experimental result where the highest heat transfer coefficient enhancement percentage is shown by 0.4 vol% MWCNT nanofluids by the value of 35%. Reduction in heat transfer coefficient for 0.5 vol% MWCNT nanofluid in the experimental work is due the high viscosity which influenced the flow rate of the nanofluids.