Abstract:
The thermal quadrupole method is utilized to determine the thermophysical properties of materials. By this technique, the thermal diffusivity and conductivity of different nanofluids containing surfactants (humic acid, sodium salt of humic acid and sodium carboxymethyl cellulose and multi-wall carbon nanotubes were evaluated at room temperature and at 75 ºC. Values of thermal diffusivity varying in the range from 9.60x10-8 m²∙s-1 to 1.46x10-7 m²∙s -1 and thermal conductivity from 0.26 W∙m-1∙K-1 to 0.41 W∙m-1∙K-1 were obtained.
