Dispersion Behaviour and Characteristics of A12O3-H2O Nanofluids with Dependence of Time

摘要：

Nanofluids are kind of engineering material, with a new challenge for thermal sciences provided by nanotechnology. Nanofluids are being investigated for numerous applications, including cooling process, manufacturing process, chemical process pharmaceutical process and medical treatment process etc. Nanofluids are basically the suspension of solid nanoparticles with size typically 1-100 nm in base fluid. In current research, Alumina size less than 50nm has been used. The tested nanofluids have been prepared by dispersing Al2O3 into DI water at three different conditions by using lwt％, 3wt％ and 5wt％ concentrations of alumina without using any surfactant. To ensure the quality of dispersion and stability of alumina nanoparticles in DI water, an ultrasonicator with 47 kHz frequency and dispersion time until 3hrs has been used. Particle sedimentation test of these different condition nanofluid samples also critically checked. As per result, after 30days approximately 28％ particle sedimentation recorded in 3wt％ and 21％ sedimentation recorded in 5wt％ Al2O3 nanofluid, prepared with 3hrs ultrasonicator dispersion time. Also the particle size (PSS) result for 3wt％ and 5wt％ Al2O3 nanofluid with dispersion time 3hrs got 46nm and 60nm respectively. The present research will be helpful to investigate the dispersion behaviour of different condition waterbased Al2O3 nanofluid with respect to time without using surfactants or any other surface additives to use further in heat transfer processes.

关键词： Al2O3 Nanofluid, Sedimentation Alumina Nanoparticles DI Water Particle Size System (PSS)

作者: Hafizur Rehman Munkhbayar.B Yeonggeun Kim Hyomin Jeong Hanshik Chung

作者单位: Department of Mechanical and Precision Engineering, Gyeongsang National University, 445 Inpyeong Don Department of Mechanical and Precision Engineering, Gyeongsang National University, Institute of Mar

会议类型: 国际会议

会议名称: The 7th International Conference on Fluid and Thermal Energy Conversion(第七届流动技术与热能转化国际会议 FTEC 2011)

会议地点: 郑州

会议语种:英文

页码: 242-248

在线出版日期: 2011-09-24（万方平台首次上网日期，不代表论文的发表时间）