Abstract
The thermo-physical properties of Carbon Nano Tube Fluid (MWNT) are elucidated in order to consider the temperature dependency. The values of thermo-physical properties such as density, viscosity, specific heat, thermal conductivity and thermal diffiisivity are measured experimentally and quantitatively. The heat transfer of natural convection is also investigated in a horizontal enclosed rectangular container filled up with MWNT under the conditions of undersurface heating and upper surface cooling.