Thermophysical Properties of Al2O3-water Nanofluids

摘要：

Aqueous nanofluids composed of alumina nanoparticles with different sizes at a concentration from 0.1vol％ to 0.5vol％ were prepared by a two-step method. The suspension and dispersion characteristics were experimentally examined by zeta potential, average size and absorption spectrum. The thermophysical properties such as the viscosity, surface tension, thermal conductivity, saturation vapor pressure and latent heat of vaporization were measured. The influences of the particle size, particle volume concentration and temperature on the thermophysical property were investigated. It was found that the viscosity and thermal conductivity increased with decreasing nanoparticle size. In contrast, the surface tension, saturation vapor pressure and latent heat of vaporization decrease with decreasing nanoparticle size. The viscosity, thermal conductivity and saturation vapor pressure have an increasing tendency with increasing volume concentration. However, surface tension and latent heat of vaporization showed a reverse tendency. Furthermore, the temperature also showed had obvious influence on the nanofluids viscosity, thermal conductivity and surface tension.

关键词： Nanofluids Viscosity Surface tension Thermal conductivity

作者: Bao-jie Zhu Wei-lin Zhao Jin-kai Li Yan-xiang Guan Dong-dong Li

作者单位: School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 266-271

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）