Investigation of thermal conductivity and viscosity of nanofluid

Wan Mohd Hanis , Wan Harun (2013) Investigation of thermal conductivity and viscosity of nanofluid. Project Report. UTeM, Melaka. (Submitted)

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Abstract

Nanofluids are the new technology related to the heat transfer, thermal conductivity and others. Nanofluids can be produce by combination between base fluids and nanoparticles. In this experiment, the type of nanoparticles that used is carbon nanotube. The type of base fluids is water as the water has a good thermal conductivity which is widely used especially in the industry. In nanofluid research, the selection of the carbon nanotube in nanofluid formation is very important. Hence, the Pyrograf HHT 24 has been chosen as the nanoparticles. As the carbon nanotube characteristic is hydrophobic, a dispersing agent was introduced to allow the carbon nanotube dispersed completely in the water. The type of dispersing agent in this research is Sodium Dodecyl Sulphate (SDS). So, the formation of nanofluid will be completed with the combination between carbon nanotube, dispersing agent and water. The stability of nanofluid combination also has been considered in order to continue another test which is thermal conductivity and viscosity. As the nanofluid can enhance the thermal conductivity of the water, the thermal conductivity test has been carried out in order to compare the thermal conductivity of water and nanofluid. Besides that, the viscosity test also being carry out to determine the rate of viscosity of nanofluid. The result shows the thermal conductivity of nanofluid is greater than water as the enhancement is achieved. Besides that, the viscosity of nanofluid increase with the addition of carbon nanotube in the water. The greatest enhancement of thermal conductivity that been achieved is at NF013 which has 47.93 % at temperature 40°C. In conclusion, the enhancement of thermal conductivity and investigation of nanofluid viscosity was achieved.

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