Experimental Study on Dynamic Thermal Conductivity of Nanofluids in Forced Convective Heat Transfer

초록

In this study, the forced convective heat transfer in flows of aqueous SiO2-water nanofluids (containing a colloidal suspension of SiO2 nanoparticles with 24 nm nominal diameter) inside a circular tube of 1 m in length and 1.75 mm in diameter was experimentally investigated to explore the dynamic thermal conductivity under constant wall temperature boundary conditions. Also, the results were compared with the values measured using a commercial thermometer (e.g., KD2 Pro) to study the differences with static thermal conductivity. In addition, the effects of experimental parameters such as flow rates and particle concentrations on the thermal performance of nanofluids were discussed.