Investigation on characteristics of thermal conductivity enhancement of nanofluids |
| |
Authors: | YJ Hwang YC Ahn HS Shin CG Lee GT Kim HS Park JK Lee |
| |
Institution: | aDepartment of Mechanical Engineering, Pusan National University, San 30, Jangjeon-Dong, Kumjung-Ku, Busan 609-735, Republic of Korea |
| |
Abstract: | It has been shown that a nanofluid consisting of nanoparticles dispersed in base fluid has much higher effective thermal conductivity than pure fluid. In this study, four kinds of nanofluids such as multiwalled carbon nanotube (MWCNT) in water, CuO in water, SiO2 in water, and CuO in ethylene glycol, are produced. Their thermal conductivities are measured by a transient hot-wire method. The thermal conductivity enhancement of water-based MWCNT nanofluid is increased up to 11.3% at a volume fraction of 0.01. The measured thermal conductivities of MWCNT nanofluids are higher than those calculated with Hamilton–Crosser model due to neglecting solid–liquid interaction at the interface. The results show that the thermal conductivity enhancement of nanofluids depends on the thermal conductivities of both particles and the base fluid. |
| |
Keywords: | Nanofluids Nanoparticle Thermal conductivity Zeta potential Transient hot-wire method |
本文献已被 ScienceDirect 等数据库收录! |
|