Design and Construction of Hot Wire-Probe Beam Displacement for Measurement Thermal Conductivity and Thermal Diffusivity of Chromium （Cr） Nanofluid in Distilled Water

This paper presents a new result of the thermal conductivity and thermal diffusivity of chromium （Cr） nanoparticle suspended in distilled water at different concentration of nanoparticles. All samples have been prepared using single step method. The thermal conductivity and themaal diffusivity were measured via hot wire-laser beam displacement technique. A numerical model of the heat conduction equation and probe beam deflection has been performed to determine the effective thermal conductivity and effective thermal diffusivity of chromium nanofluids. By fitting the experimental data to the numerical model, the thermal conductivity and thermal diffusivity of chromium nanofluid were obtained. diffusivity of chromium nanofluids increases with increasing The results show that the effective thermal conductivity and thermal of nanoparticles concentration in base fluid.